YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.75276e+01 3.00485e-01 122 2000 3 1.72224e+01 9.76839e-01 1165 2000 4 2.18683e+01 2.79656e+00 100 2000 5 2.57837e+01 1.25534e+00 403 2000 6 2.82300e+01 8.69242e-01 352 2000 7 3.20069e+01 1.37561e+00 811 2000 8 3.31980e+01 1.01583e+00 873 2000 9 3.01493e+01 6.55364e-01 1611 2000 10 2.89990e+01 7.68965e-01 2242 2000 11 2.56668e+01 1.34733e+00 1236 2000 12 2.25168e+01 1.01686e+00 1059 2001 1 2.03359e+01 6.66007e-01 2154 2001 2 1.86193e+01 8.67845e-01 1829 2001 3 1.95480e+01 8.77941e-01 1562 2001 4 2.24427e+01 1.11844e+00 1140 2001 5 2.56543e+01 1.25747e+00 933 2001 6 2.77252e+01 6.08438e-01 244 2001 7 3.13178e+01 1.59254e+00 1413 2001 8 3.27309e+01 1.16113e+00 2264 2001 9 3.17282e+01 6.69839e-01 2596 2001 10 3.01707e+01 6.55288e-01 2502 2001 11 2.79849e+01 1.30781e+00 2152 2001 12 2.28256e+01 1.01204e+00 1424 2002 1 2.08438e+01 7.56623e-01 1892 2002 2 1.94269e+01 6.47539e-01 1360 2002 3 1.96489e+01 7.98726e-01 856 2002 4 2.17110e+01 1.58058e+00 981 2002 5 2.65593e+01 1.17322e+00 1864 2002 6 2.92902e+01 1.22461e+00 1356 2002 7 3.16526e+01 8.69570e-01 3183 2002 8 3.16013e+01 8.38913e-01 4365 2002 9 3.09728e+01 6.96870e-01 4209 2002 10 3.06084e+01 7.70011e-01 5120 2002 11 2.75116e+01 1.20948e+00 4111 2002 12 2.28076e+01 1.18231e+00 2422 2003 1 2.03454e+01 1.04392e+00 2839 2003 2 1.84146e+01 8.19614e-01 2313 2003 3 1.79497e+01 1.11018e+00 2220 2003 4 2.10936e+01 1.51395e+00 1452 2003 5 2.54298e+01 1.57039e+00 2382 2003 6 2.86034e+01 1.72207e+00 1718 2003 7 3.03712e+01 1.16527e+00 3155 2003 8 3.24816e+01 1.16601e+00 4701 2003 9 3.08510e+01 8.93762e-01 4844 2003 10 2.99401e+01 6.10498e-01 5316 2003 11 2.67432e+01 1.58576e+00 3941 2003 12 2.29450e+01 1.10837e+00 1969 2004 1 2.04401e+01 8.48119e-01 2508 2004 2 1.91793e+01 8.64841e-01 2640 2004 3 1.98091e+01 9.52568e-01 3078 2004 4 2.10218e+01 1.02326e+00 1589 2004 5 2.49160e+01 1.68264e+00 2173 2004 6 2.86830e+01 1.18150e+00 2281 2004 7 3.16438e+01 1.15913e+00 4381 2004 8 3.16552e+01 6.87152e-01 4433 2004 9 3.11752e+01 8.84127e-01 4379 2004 10 2.95777e+01 1.35083e+00 4175 2004 11 2.77402e+01 1.34455e+00 3236 2004 12 2.27785e+01 1.96861e+00 2901 2005 1 1.92096e+01 1.28854e+00 3120 2005 2 1.79300e+01 6.61946e-01 2063 2005 3 1.85729e+01 8.72626e-01 2788 2005 4 2.13953e+01 1.80563e+00 2054 2005 5 2.57978e+01 2.28328e+00 2659 2005 6 2.85484e+01 1.08069e+00 2563 2005 7 3.07174e+01 1.64563e+00 2282 2005 8 3.18256e+01 8.13074e-01 4032 2005 9 3.08784e+01 9.55524e-01 4635 2005 10 2.85448e+01 1.20022e+00 5099 2005 11 2.55527e+01 9.77641e-01 3181 2005 12 2.35966e+01 9.09340e-01 3666 2006 1 2.05569e+01 1.19971e+00 2368 2006 2 1.86182e+01 1.06749e+00 2145 2006 3 1.90906e+01 1.07915e+00 2609 2006 4 2.20057e+01 1.62933e+00 2164 2006 5 2.66294e+01 1.34263e+00 3334 2006 6 3.01048e+01 9.06833e-01 3491 2006 7 3.07140e+01 1.19987e+00 2873 2006 8 3.23365e+01 1.33556e+00 3754 2006 9 3.19622e+01 9.08729e-01 4768 2006 10 2.99857e+01 7.11861e-01 3522 2006 11 2.72324e+01 1.48010e+00 4050 2006 12 2.19523e+01 1.65578e+00 2328 2007 1 1.88958e+01 1.22737e+00 2770 2007 2 1.70300e+01 8.20609e-01 2593 2007 3 1.77824e+01 1.39437e+00 2528 2007 4 2.03230e+01 1.43618e+00 1337 2007 5 2.69293e+01 2.25179e+00 1828 2007 6 2.95866e+01 8.33324e-01 2694 2007 7 3.06283e+01 1.20021e+00 4204 2007 8 3.24693e+01 9.99245e-01 4319 2007 9 3.24106e+01 1.02121e+00 4906 2007 10 3.03019e+01 7.49192e-01 5944 2007 11 2.73373e+01 1.14575e+00 4598 2007 12 2.27473e+01 1.14052e+00 3087 2008 1 1.88415e+01 1.19400e+00 1343 2008 2 1.71766e+01 8.23973e-01 2711 2008 3 1.77534e+01 9.39270e-01 1213 2008 4 2.15946e+01 1.84565e+00 1845 2008 5 2.56086e+01 1.77867e+00 1908 2008 6 2.79888e+01 9.94812e-01 899 2008 7 3.06076e+01 1.60114e+00 2613 2008 8 3.19865e+01 1.34090e+00 3646 2008 9 3.16084e+01 1.55783e+00 3940 2008 10 2.89351e+01 8.76717e-01 3847 2008 11 2.56692e+01 1.20511e+00 3521 2008 12 2.24099e+01 1.12570e+00 4490 2009 1 1.85221e+01 1.32537e+00 3444 2009 2 1.68886e+01 1.14314e+00 1481 2009 3 1.80693e+01 1.13884e+00 1831 2009 4 2.03250e+01 1.47831e+00 2220 2009 5 2.62321e+01 2.63173e+00 1817 2009 6 2.87228e+01 1.88146e+00 2035 2009 7 2.95603e+01 9.87491e-01 1628 2009 8 3.06279e+01 1.07317e+00 3489 2009 9 3.03199e+01 8.88797e-01 4509 2009 10 2.85285e+01 7.64173e-01 3065 2009 11 2.73299e+01 9.41822e-01 3663 2009 12 2.35914e+01 1.28994e+00 3295 2010 1 2.08883e+01 9.57295e-01 2840 2010 2 1.94364e+01 9.30012e-01 2365 2010 3 2.02688e+01 1.48706e+00 2512 2010 4 2.21611e+01 1.77967e+00 1681 2010 5 2.60685e+01 1.14159e+00 1843 2010 6 2.89032e+01 1.30486e+00 1980 2010 7 3.09004e+01 1.23916e+00 2335 2010 8 3.31696e+01 1.20961e+00 4045 2010 9 3.26766e+01 1.28450e+00 4853 2010 10 3.02511e+01 1.05390e+00 4761 2010 11 2.77559e+01 8.68195e-01 5107 2010 12 2.43947e+01 1.41953e+00 3979 2011 1 2.09141e+01 9.08545e-01 2549 2011 2 1.80380e+01 1.14219e+00 2074 2011 3 1.88074e+01 7.12805e-01 2476 2011 4 2.10585e+01 1.67917e+00 1333 2011 5 2.66021e+01 2.14513e+00 2088 2011 6 2.85044e+01 1.28989e+00 1245 2011 7 3.11834e+01 1.84914e+00 3082 2011 8 3.25634e+01 1.01039e+00 4778 2011 9 3.14793e+01 6.88599e-01 4735 2011 10 2.86924e+01 1.49395e+00 4718 2011 11 2.55543e+01 1.33478e+00 2662 2011 12 2.17643e+01 1.34517e+00 4278 2012 1 1.85339e+01 1.10199e+00 3004 2012 2 1.73461e+01 1.09010e+00 2092 2012 3 1.63949e+01 1.49082e+00 1938 2012 4 1.98880e+01 2.11150e+00 1522 2012 5 2.49908e+01 2.29043e+00 1049 2012 6 2.93024e+01 1.34836e+00 2335 2012 7 3.20357e+01 1.79862e+00 3521 2012 8 3.24434e+01 9.92372e-01 4497 2012 9 3.14167e+01 8.74057e-01 4743 2012 10 3.07737e+01 1.09928e+00 4647 2012 11 2.86107e+01 1.10370e+00 3119 2012 12 2.39519e+01 1.07243e+00 2607 2013 1 2.10063e+01 1.06057e+00 3184 2013 2 1.96348e+01 9.64767e-01 3297 2013 3 1.96725e+01 1.11828e+00 2661 2013 4 2.21029e+01 1.31283e+00 1852 2013 5 2.51567e+01 2.06442e+00 3461 2013 6 2.83094e+01 9.81292e-01 1695 2013 7 3.09534e+01 6.28199e-01 3441 2013 8 3.23083e+01 8.31308e-01 4981 2013 9 3.17453e+01 8.53671e-01 5658 2013 10 2.84070e+01 1.22898e+00 4741 2013 11 2.56472e+01 7.25008e-01 3742 2013 12 2.27239e+01 1.32658e+00 4120 2014 1 1.93804e+01 7.05031e-01 2455 2014 2 1.83003e+01 5.73059e-01 3014 2014 3 1.93758e+01 1.41100e+00 2840 2014 4 2.18660e+01 1.92212e+00 2147 2014 5 2.70236e+01 1.64161e+00 3597 2014 6 2.95991e+01 9.98939e-01 3087 2014 7 3.10691e+01 7.24980e-01 4152 2014 8 3.18372e+01 1.18671e+00 4591 2014 9 3.20907e+01 9.32652e-01 5453 2014 10 3.03809e+01 1.32532e+00 5317 2014 11 2.70930e+01 9.56851e-01 3879 2014 12 2.35134e+01 9.90689e-01 4064 2015 1 2.09923e+01 1.09511e+00 3163 2015 2 1.91249e+01 1.25812e+00 2168 2015 3 1.97498e+01 9.26157e-01 2429 2015 4 2.15299e+01 9.98643e-01 1703 2015 5 2.59331e+01 1.97260e+00 2054 2015 6 2.90260e+01 8.94091e-01 2714 2015 7 3.16270e+01 2.03131e+00 2991 2015 8 3.34597e+01 7.14349e-01 5559 2015 9 3.28616e+01 1.19248e+00 4817 2015 10 3.10026e+01 1.20664e+00 4735 2015 11 2.75700e+01 1.27882e+00 3754 2015 12 2.33690e+01 1.43975e+00 3483 2016 1 1.98195e+01 7.83893e-01 3998 2016 2 1.83273e+01 7.57405e-01 3399 2016 3 1.96015e+01 1.05772e+00 2243 2016 4 2.28067e+01 1.93852e+00 3061 2016 5 2.68453e+01 1.45996e+00 2744 2016 6 2.90727e+01 1.18765e+00 2725 2016 7 3.16230e+01 1.28805e+00 3990 2016 8 3.33979e+01 9.14613e-01 4912 2016 9 3.21479e+01 1.27348e+00 4507 2016 10 2.93332e+01 9.75868e-01 4237 2016 11 2.78350e+01 9.88899e-01 2966 2016 12 2.37033e+01 1.49054e+00 3187 2017 1 2.04302e+01 1.04224e+00 2722 2017 2 1.75801e+01 1.30831e+00 2281 2017 3 1.87172e+01 1.53303e+00 1774 2017 4 2.21209e+01 1.24583e+00 1258 2017 5 2.66267e+01 1.75974e+00 2492 2017 6 2.85309e+01 1.47540e+00 1385 2017 7 3.23268e+01 1.55048e+00 3940 2017 8 3.44302e+01 7.08858e-01 4821 2017 9 3.34773e+01 7.62114e-01 5272 2017 10 3.03014e+01 1.36607e+00 4873 2017 11 2.82001e+01 9.88122e-01 3599 2017 12 2.38784e+01 1.38997e+00 4293 2018 1 2.05524e+01 1.04930e+00 4342 2018 2 1.91991e+01 1.02836e+00 2037 2018 3 2.07562e+01 1.50567e+00 3027 2018 4 2.28585e+01 1.60315e+00 1524 2018 5 2.67877e+01 1.89306e+00 3178 2018 6 2.96716e+01 1.14845e+00 2579 2018 7 3.13553e+01 7.77039e-01 3771 2018 8 3.15449e+01 7.63849e-01 4657 2018 9 3.29557e+01 8.10151e-01 5724 2018 10 3.17301e+01 1.16046e+00 4787 2018 11 2.75897e+01 1.01103e+00 1546 2018 12 2.45882e+01 9.87862e-01 3441 2019 1 2.09790e+01 1.87536e+00 1563 2019 2 1.95126e+01 8.88884e-01 2366 2019 3 1.89059e+01 1.01934e+00 3117 2019 4 2.13191e+01 1.27410e+00 2591 2019 5 2.73567e+01 2.33494e+00 3740 2019 6 3.18750e+01 1.21583e+00 4645 2019 7 3.15711e+01 8.60874e-01 4311 2019 8 3.29592e+01 8.04283e-01 5814 2019 9 3.25993e+01 7.21057e-01 6300 2019 10 3.24116e+01 8.87740e-01 4993 2019 11 2.80150e+01 1.50515e+00 4685 2019 12 2.38301e+01 9.92805e-01 3259 2020 1 2.13280e+01 9.71698e-01 3356 2020 2 1.95218e+01 5.97249e-01 3503 2020 3 1.96765e+01 9.04592e-01 3660 2020 4 2.24855e+01 1.48797e+00 2600 2020 5 2.74918e+01 1.84515e+00 4939 2020 6 2.95132e+01 7.91153e-01 6833 2020 7 3.31650e+01 1.50386e+00 5211 2020 8 3.37195e+01 8.79217e-01 4610 2020 9 3.33429e+01 8.12830e-01 6412 2020 10 3.10826e+01 1.23282e+00 7257 2020 11 2.86192e+01 9.05344e-01 3554 2020 12 2.41812e+01 1.28882e+00 3456 2021 1 2.10860e+01 1.05092e+00 5101 2021 2 1.96458e+01 7.79570e-01 4510 2021 3 1.92645e+01 7.58588e-01 4266 2021 4 2.24486e+01 2.21054e+00 2675 2021 5 2.84402e+01 1.75555e+00 5217 2021 6 2.94257e+01 1.01053e+00 6219 2021 7 3.34609e+01 1.11504e+00 5972 2021 8 3.41483e+01 7.21062e-01 6484 2021 9 3.23759e+01 1.04246e+00 6162 2021 10 2.98739e+01 1.22012e+00 6618 2021 11 2.71458e+01 1.08133e+00 4993 2021 12 2.43918e+01 1.23021e+00 2512 2022 1 2.05829e+01 1.16410e+00 3579 2022 2 1.89591e+01 7.00987e-01 4595 2022 3 -7.38118e+01 2.92708e+02 3517 2022 4 2.19718e+01 1.31888e+00 1430 2022 5 2.51784e+01 9.39410e-01 3934 2022 6 2.93625e+01 8.16441e-01 5239 2022 7 3.15157e+01 1.60807e+00 3419 2022 8 3.41041e+01 7.64987e-01 5385 2022 9 3.29513e+01 9.79378e-01 5480 2022 10 3.08488e+01 5.42317e-01 4150 2022 11 2.82875e+01 1.11329e+00 2789 2022 12 2.53222e+01 1.22229e+00 4091 2023 1 2.13185e+01 1.01163e+00 2182 2023 2 1.98132e+01 8.02130e-01 1903 2023 3 2.06648e+01 6.84240e-01 4599 2023 4 2.28177e+01 1.97501e+00 4437 2023 5 2.61982e+01 1.60924e+00 4034 2023 6 2.97056e+01 8.70922e-01 5294 2023 7 3.23825e+01 1.31900e+00 5908 2023 8 3.44505e+01 7.21550e-01 6031 2023 9 3.31736e+01 9.34521e-01 5968 2023 10 3.11611e+01 1.02220e+00 5749 2023 11 2.81526e+01 1.09392e+00 3672 2023 12 2.49843e+01 1.25190e+00 4174 2024 1 2.18499e+01 9.00546e-01 4035 2024 2 2.04571e+01 5.19186e-01 4347 2024 3 2.01490e+01 6.11952e-01 3574 2024 4 2.18753e+01 6.97820e-01 809