YEAR MONTH MEAN STDEV COUNT 2002 1 nan nan 0 2002 2 nan nan 0 2002 3 nan nan 0 2002 4 nan nan 0 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 2.97952e+00 7.68559e-01 130 2002 8 3.47571e+00 2.92458e+00 219 2002 9 4.35669e+00 2.87649e+00 194 2002 10 4.08406e+00 1.74379e+00 617 2002 11 6.17397e+00 3.06397e+00 638 2002 12 5.40280e+00 2.07247e+00 444 2003 1 8.38998e+00 3.62817e+00 831 2003 2 5.07422e+00 1.57224e+00 559 2003 3 1.75384e+01 9.79539e+00 165 2003 4 2.56329e+01 1.36937e+01 62 2003 5 8.91107e+00 3.11684e+00 64 2003 6 4.40419e-04 2.91038e-11 6 2003 7 nan nan 0 2003 8 8.26992e+00 6.19399e+00 143 2003 9 6.01838e+00 3.55695e+00 207 2003 10 6.47738e+00 3.48012e+00 408 2003 11 4.44329e+00 1.45714e+00 874 2003 12 4.89516e+00 1.47378e+00 544 2004 1 4.66379e+00 1.63674e+00 631 2004 2 4.65779e+00 1.43806e+00 270 2004 3 7.84379e+00 4.07563e+00 538 2004 4 5.62410e+00 1.73565e+00 307 2004 5 4.29914e+00 1.42440e+00 308 2004 6 2.49911e+00 4.18046e-01 115 2004 7 4.29901e+00 3.06907e+00 178 2004 8 3.58431e+00 1.45960e+00 250 2004 9 4.18380e+00 1.13209e+00 92 2004 10 1.80477e+01 8.91184e+00 169 2004 11 1.72107e+01 5.63767e+00 106 2004 12 8.78872e+00 2.50747e+00 141 2005 1 1.01223e+01 3.70255e+00 433 2005 2 8.54184e+00 3.45943e+00 428 2005 3 7.68616e+00 3.70363e+00 449 2005 4 1.49819e+01 8.73244e+00 178 2005 5 1.24890e+01 8.36809e+00 92 2005 6 1.09025e+01 6.45011e+00 188 2005 7 2.22603e+01 9.67083e+00 102 2005 8 1.43261e+01 7.19290e+00 63 2005 9 7.59951e+00 2.35417e+00 198 2005 10 5.14761e+00 2.78016e+00 512 2005 11 4.36304e+00 1.71742e+00 723 2005 12 4.93604e+00 2.15528e+00 720 2006 1 9.18826e+00 4.79206e+00 407 2006 2 1.04676e+01 4.60545e+00 397 2006 3 1.17235e+01 4.62676e+00 794 2006 4 5.24185e+00 3.48385e+00 313 2006 5 3.66009e+00 8.20527e-01 189 2006 6 3.85932e+00 1.54551e+00 259 2006 7 5.28515e+00 2.46641e+00 82 2006 8 5.09951e+00 1.03696e+00 87 2006 9 4.79672e+00 1.51139e+00 439 2006 10 4.01536e+00 1.50405e+00 565 2006 11 3.62023e+00 1.79179e+00 594 2006 12 2.00744e+00 7.26151e-01 316 2007 1 3.31984e+00 1.49025e+00 405 2007 2 3.00370e+00 1.02550e+00 491 2007 3 2.96615e+00 1.20431e+00 645 2007 4 3.12753e+00 1.03836e+00 261 2007 5 2.78399e+00 5.84634e-01 64 2007 6 2.96329e+00 7.70754e-01 78 2007 7 3.78873e+00 1.82876e+00 405 2007 8 3.61275e+00 1.03222e+00 214 2007 9 4.75754e+00 4.32328e+00 191 2007 10 1.94993e+00 7.02429e-01 273 2007 11 2.15573e+00 1.02823e+00 731 2007 12 1.89477e+00 1.52411e+00 434 2008 1 2.98835e+00 2.50273e+00 268 2008 2 3.32729e+00 1.55881e+00 684 2008 3 4.61843e+00 2.27162e+00 498 2008 4 7.75043e+00 4.61498e+00 383 2008 5 6.13440e+00 2.43691e+00 254 2008 6 3.64508e+00 1.03985e+00 138 2008 7 4.99221e+00 2.25508e+00 163 2008 8 4.72981e+00 1.61242e+00 97 2008 9 6.26774e+00 7.21644e+00 147 2008 10 4.56048e+00 1.73357e+00 625 2008 11 3.43308e+00 1.27441e+00 722 2008 12 5.11871e+00 2.15402e+00 555 2009 1 5.52540e+00 1.96753e+00 534 2009 2 4.79689e+00 2.21246e+00 539 2009 3 3.56570e+00 1.61137e+00 618 2009 4 6.13213e+00 3.17256e+00 353 2009 5 8.73449e+00 5.56747e+00 92 2009 6 4.33365e+00 7.73654e-01 64 2009 7 3.47515e+00 6.16453e-01 64 2009 8 6.89050e+00 2.75212e+00 276 2009 9 6.23720e+00 2.80889e+00 358 2009 10 4.46520e+00 1.91674e+00 576 2009 11 2.87858e+00 1.06673e+00 341 2009 12 4.15247e+00 1.73616e+00 161 2010 1 5.72935e+00 2.36931e+00 574 2010 2 1.75008e+01 9.09621e+00 321 2010 3 1.96502e+01 7.41974e+00 406 2010 4 1.35430e+01 6.62461e+00 281 2010 5 7.91553e+00 2.56949e+00 277 2010 6 6.31473e+00 2.62695e+00 393 2010 7 5.77802e+00 1.43983e+00 136 2010 8 4.53027e+00 6.68725e-01 64 2010 9 4.88927e+00 1.99953e+00 279 2010 10 4.11035e+00 1.67843e+00 1116 2010 11 3.36731e+00 1.49127e+00 735 2010 12 3.64530e+00 1.56013e+00 508 2011 1 3.75389e+00 1.64016e+00 553 2011 2 4.61000e+00 2.32419e+00 582 2011 3 4.22526e+00 2.05828e+00 729 2011 4 4.20164e+00 1.26992e+00 565 2011 5 3.56488e+00 1.30615e+00 491 2011 6 3.06673e+00 9.74839e-01 150 2011 7 3.41998e+00 1.08144e+00 219 2011 8 3.61842e+00 1.67263e+00 174 2011 9 2.91877e+00 8.47514e-01 549 2011 10 3.25727e+00 1.39982e+00 782 2011 11 2.81928e+00 1.51875e+00 775 2011 12 3.08435e+00 2.21558e+00 731 2012 1 3.21469e+00 1.65263e+00 866 2012 2 3.22554e+00 1.40713e+00 192 2012 3 3.58969e+00 1.63014e+00 598 2012 4 3.08325e+00 8.85647e-01 431 2012 5 2.67740e+00 6.59391e-01 274 2012 6 5.48693e+00 1.02847e+00 6 2012 7 2.78644e+01 1.10216e+01 65 2012 8 2.49947e+01 8.79629e+00 55 2012 9 1.76653e+01 9.59339e+00 159 2012 10 1.49877e+01 6.40969e+00 265 2012 11 7.36167e+00 2.16019e+00 653 2012 12 7.93107e+00 4.76345e+00 131 2013 1 5.46217e+00 4.02025e+00 377 2013 2 5.55534e+00 1.52856e+00 224 2013 3 5.73459e+00 1.34899e+00 487 2013 4 1.06371e+01 3.78359e+00 265 2013 5 6.89774e+00 2.34296e+00 253 2013 6 1.51451e+01 1.15915e+01 305 2013 7 2.90500e+01 7.67475e+00 31 2013 8 2.69647e+01 1.06916e+01 62 2013 9 2.18688e+01 1.00710e+01 175 2013 10 9.86100e+00 4.19948e+00 453 2013 11 6.23585e+00 3.12789e+00 97 2013 12 6.07264e+00 4.29903e+00 498 2014 1 7.42035e+00 4.57683e+00 402 2014 2 8.04400e+00 5.61816e+00 490 2014 3 2.03186e+01 1.02988e+01 317 2014 4 2.30613e+01 1.10514e+01 213 2014 5 2.98492e+01 1.49011e+01 25 2014 6 1.69934e+01 1.09870e+01 127 2014 7 1.02227e+01 2.91440e+00 331 2014 8 8.64348e+00 1.72727e+00 96 2014 9 7.98178e+00 7.75807e+00 221 2014 10 6.62622e+00 2.92878e+00 1004 2014 11 5.25514e+00 1.85847e+00 726 2014 12 3.85195e+00 2.08432e+00 457 2015 1 4.76772e+00 2.54954e+00 538 2015 2 6.11459e+00 1.65460e+00 653 2015 3 9.81864e+00 3.49585e+00 276 2015 4 9.35830e+00 3.10462e+00 108 2015 5 6.41747e+00 2.04599e+00 273 2015 6 5.97739e+00 1.06490e+00 128 2015 7 8.47225e+00 1.51405e+00 25 2015 8 1.61746e+01 1.15163e+01 115 2015 9 9.09916e+00 7.25585e+00 98 2015 10 5.51570e+00 2.70829e+00 404 2015 11 6.75608e+00 2.28202e+00 402 2015 12 4.90688e+00 2.30157e+00 517 2016 1 4.84640e+00 1.99363e+00 353 2016 2 6.84029e+00 3.78485e+00 774 2016 3 7.19672e+00 3.86652e+00 602 2016 4 5.20622e+00 1.45129e+00 330 2016 5 6.50582e+00 1.44528e+00 211 2016 6 5.00949e+00 1.81252e+00 366 2016 7 6.21903e+00 2.11577e+00 483 2016 8 1.09152e+01 6.09417e+00 406 2016 9 8.86264e+00 3.68011e+00 411 2016 10 7.56467e+00 5.32363e+00 457 2016 11 3.27099e+00 1.61276e+00 624 2016 12 3.56060e+00 1.83524e+00 438 2017 1 4.80517e+00 2.47917e+00 349 2017 2 4.39951e+00 2.11808e+00 788 2017 3 4.25080e+00 2.74404e+00 548 2017 4 3.87751e+00 9.25735e-01 485 2017 5 4.15427e+00 1.04146e+00 231 2017 6 4.67389e+00 1.76488e+00 145 2017 7 6.71679e+00 2.87345e+00 92 2017 8 7.23949e+00 4.68073e+00 273 2017 9 5.83141e+00 4.43610e+00 422 2017 10 1.00457e+01 3.95100e+00 435 2017 11 5.53567e+00 3.72545e+00 793 2017 12 3.50043e+00 9.74866e-01 507 2018 1 4.84385e+00 1.93255e+00 503 2018 2 4.02838e+00 1.58570e+00 549 2018 3 5.43110e+00 2.91717e+00 597 2018 4 7.67783e+00 5.97460e+00 248 2018 5 6.52261e+00 1.76407e+00 314 2018 6 7.08249e+00 3.22480e+00 304 2018 7 1.06040e+01 3.00846e+00 79 2018 8 2.01539e+01 9.40303e+00 210 2018 9 9.76743e+00 4.08086e+00 396 2018 10 7.14325e+00 2.73380e+00 540 2018 11 6.76087e+00 2.01941e+00 123 2018 12 1.58054e+01 1.07602e+01 358 2019 1 2.18156e+01 7.49043e+00 221 2019 2 1.53068e+01 5.93984e+00 295 2019 3 1.12162e+01 6.59298e+00 547 2019 4 8.53656e+00 4.74388e+00 347 2019 5 5.57322e+00 1.48815e+00 336 2019 6 4.64887e+00 4.97606e-01 14 2019 7 5.20828e+00 9.81500e-01 38 2019 8 1.45139e+01 1.07938e+01 267 2019 9 7.11526e+00 4.76980e+00 243 2019 10 6.11082e+00 2.22720e+00 377 2019 11 3.76863e+00 1.79431e+00 543 2019 12 4.39027e+00 3.04888e+00 267 2020 1 3.99640e+00 9.54302e-01 375 2020 2 5.32576e+00 2.59217e+00 488 2020 3 4.64292e+00 1.70237e+00 625 2020 4 5.43283e+00 3.37156e+00 438 2020 5 4.46650e+00 1.40963e+00 310 2020 6 4.64993e+00 1.88759e+00 159 2020 7 7.12959e+00 2.21063e+00 23 2020 8 5.84481e+00 2.59017e+00 161 2020 9 9.89891e+00 3.39218e+00 128 2020 10 9.23108e+00 2.78537e+00 302 2020 11 5.97260e+00 3.78187e+00 385 2020 12 4.54483e+00 1.87478e+00 457 2021 1 7.22252e+00 2.99066e+00 483 2021 2 1.04973e+01 5.86152e+00 397 2021 3 8.96454e+00 4.04334e+00 294 2021 4 7.89961e+00 2.30801e+00 320 2021 5 5.93995e+00 1.81850e+00 384 2021 6 4.26047e+00 1.07114e+00 125 2021 7 6.16279e+00 7.27083e+00 69 2021 8 1.26270e+01 5.23743e+00 43 2021 9 1.47644e+01 5.73955e+00 279 2021 10 8.40452e+00 6.64124e+00 322 2021 11 7.93227e+00 3.60216e+00 740 2021 12 5.88311e+00 2.48097e+00 459 2022 1 5.86363e+00 1.68487e+00 416 2022 2 5.13755e+00 2.07243e+00 598 2022 3 8.40384e+00 7.96900e+00 650 2022 4 7.07727e+00 1.31867e+00 61 2022 5 8.55001e+00 3.26201e+00 313 2022 6 5.42290e+00 1.95150e+00 325 2022 7 6.96391e+00 4.81737e+00 119 2022 8 5.21979e+00 1.76991e+00 246 2022 9 4.81062e+00 1.92882e+00 255 2022 10 3.97372e+00 2.36270e+00 924 2022 11 4.21795e+00 3.35558e+00 415 2022 12 4.44592e+00 3.87871e+00 682 2023 1 3.34237e+00 8.71540e-01 707 2023 2 3.69604e+00 1.27637e+00 499 2023 3 6.64269e+00 3.27059e+00 702 2023 4 5.55447e+00 2.58368e+00 436 2023 5 5.25795e+00 2.43952e+00 230 2023 6 4.32243e+00 8.77153e+00 188 2023 7 1.25513e+01 1.03713e+01 150 2023 8 6.96029e+00 2.90032e+00 362 2023 9 1.01929e+01 4.80880e+00 161 2023 10 7.66405e+00 5.57649e+00 412 2023 11 4.80910e+00 2.78746e+00 607 2023 12 1.76494e+01 1.00921e+01 267 2024 1 2.50034e+01 8.46817e+00 209 2024 2 1.80635e+01 8.52524e+00 465 2024 3 1.74716e+01 1.06278e+01 161 2024 4 nan nan 0