YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.68474e+01 5.01500e-01 208 2000 3 1.69281e+01 8.15231e-01 1110 2000 4 2.17563e+01 2.82241e+00 118 2000 5 2.56190e+01 1.61933e+00 408 2000 6 2.80783e+01 7.00195e-01 327 2000 7 3.17656e+01 1.48910e+00 676 2000 8 3.31820e+01 1.02344e+00 979 2000 9 3.04237e+01 9.06169e-01 1953 2000 10 2.86795e+01 9.07129e-01 1806 2000 11 2.45638e+01 1.50374e+00 1275 2000 12 2.03317e+01 9.63718e-01 1147 2001 1 1.85424e+01 7.55050e-01 2022 2001 2 1.69871e+01 1.03266e+00 1585 2001 3 1.89353e+01 7.49135e-01 1591 2001 4 2.18785e+01 1.43431e+00 828 2001 5 2.50369e+01 1.84877e+00 910 2001 6 2.75644e+01 6.30594e-01 336 2001 7 3.10651e+01 1.43946e+00 1220 2001 8 3.23913e+01 9.16478e-01 2277 2001 9 3.17129e+01 6.04342e-01 2545 2001 10 2.98334e+01 7.85507e-01 2308 2001 11 2.66616e+01 2.09467e+00 1971 2001 12 2.12465e+01 1.06050e+00 1187 2002 1 1.89890e+01 8.04987e-01 1999 2002 2 1.81824e+01 5.95774e-01 1458 2002 3 1.90475e+01 8.96661e-01 971 2002 4 2.09229e+01 1.89637e+00 820 2002 5 2.62571e+01 1.13968e+00 1723 2002 6 2.89236e+01 1.18132e+00 1327 2002 7 3.14777e+01 1.03311e+00 3470 2002 8 3.12140e+01 7.94392e-01 3715 2002 9 3.03089e+01 8.03716e-01 4697 2002 10 2.95683e+01 9.49667e-01 4800 2002 11 2.63309e+01 1.54606e+00 4467 2002 12 2.16022e+01 1.32970e+00 2514 2003 1 1.90815e+01 8.28621e-01 2740 2003 2 1.77607e+01 9.43159e-01 2450 2003 3 1.76335e+01 1.32158e+00 2043 2003 4 2.09401e+01 1.65536e+00 1514 2003 5 2.48801e+01 1.87804e+00 1963 2003 6 2.86317e+01 1.40498e+00 1730 2003 7 3.01558e+01 1.04210e+00 3147 2003 8 3.19539e+01 8.30855e-01 4045 2003 9 3.07596e+01 8.57836e-01 5009 2003 10 2.93720e+01 7.76044e-01 5238 2003 11 2.51872e+01 1.61110e+00 3317 2003 12 2.11394e+01 1.12749e+00 2352 2004 1 1.82727e+01 8.24698e-01 2441 2004 2 1.77892e+01 8.07618e-01 2676 2004 3 1.89364e+01 9.02732e-01 2692 2004 4 2.05380e+01 1.44953e+00 1755 2004 5 2.47425e+01 1.66818e+00 2595 2004 6 2.83795e+01 1.22521e+00 2383 2004 7 3.13089e+01 1.13339e+00 4198 2004 8 3.13269e+01 6.83066e-01 4612 2004 9 3.06365e+01 1.13360e+00 4426 2004 10 2.93053e+01 1.37912e+00 4345 2004 11 2.67442e+01 1.96762e+00 2355 2004 12 2.05041e+01 1.62171e+00 2418 2005 1 1.68752e+01 9.29540e-01 2831 2005 2 1.63702e+01 7.75598e-01 1860 2005 3 1.80549e+01 9.98367e-01 2636 2005 4 2.09621e+01 1.67239e+00 2062 2005 5 2.54612e+01 2.02820e+00 2258 2005 6 2.83943e+01 1.08718e+00 2381 2005 7 3.03413e+01 1.53468e+00 2014 2005 8 3.13118e+01 1.03007e+00 4183 2005 9 3.04058e+01 9.65754e-01 4793 2005 10 2.82120e+01 1.12552e+00 4989 2005 11 2.46776e+01 1.43163e+00 3081 2005 12 2.21779e+01 1.17258e+00 3087 2006 1 1.83487e+01 1.15425e+00 3258 2006 2 1.72579e+01 1.01364e+00 1974 2006 3 1.87245e+01 1.05289e+00 2851 2006 4 2.16971e+01 1.76423e+00 1962 2006 5 2.64567e+01 1.51414e+00 2726 2006 6 2.96890e+01 1.04468e+00 3106 2006 7 3.06218e+01 1.17224e+00 2893 2006 8 3.17399e+01 1.08974e+00 4039 2006 9 3.15761e+01 7.53951e-01 5286 2006 10 3.00435e+01 7.06892e-01 3429 2006 11 2.63990e+01 1.77268e+00 4385 2006 12 2.05754e+01 1.84336e+00 3046 2007 1 1.60450e+01 1.26047e+00 2320 2007 2 1.64645e+01 9.71395e-01 2429 2007 3 1.78244e+01 1.37186e+00 2657 2007 4 1.97365e+01 1.03564e+00 1058 2007 5 2.70751e+01 1.98686e+00 1553 2007 6 2.93078e+01 1.11412e+00 2428 2007 7 3.03734e+01 1.15040e+00 3701 2007 8 3.17821e+01 9.25816e-01 4539 2007 9 3.16773e+01 8.61300e-01 4833 2007 10 2.98078e+01 6.25964e-01 5989 2007 11 2.65563e+01 1.63830e+00 3948 2007 12 2.09956e+01 1.41609e+00 2858 2008 1 1.71734e+01 1.15271e+00 1856 2008 2 1.50318e+01 9.43475e-01 2089 2008 3 1.71830e+01 1.43795e+00 794 2008 4 2.10104e+01 2.00283e+00 1491 2008 5 2.53363e+01 1.81520e+00 1420 2008 6 2.83728e+01 9.77753e-01 1223 2008 7 3.03083e+01 1.42757e+00 2193 2008 8 3.16828e+01 1.26638e+00 3718 2008 9 3.12347e+01 1.38399e+00 3772 2008 10 2.88834e+01 1.09890e+00 4228 2008 11 2.45529e+01 1.21003e+00 2926 2008 12 2.04238e+01 1.43961e+00 3298 2009 1 1.62628e+01 9.67991e-01 3407 2009 2 1.54599e+01 7.83838e-01 1280 2009 3 1.72942e+01 1.36740e+00 2190 2009 4 1.92835e+01 1.47775e+00 1597 2009 5 2.58541e+01 2.51073e+00 1840 2009 6 2.83877e+01 1.70276e+00 1775 2009 7 2.96703e+01 1.09140e+00 1683 2009 8 3.02804e+01 9.23676e-01 3479 2009 9 3.02491e+01 9.25738e-01 4645 2009 10 2.81850e+01 8.40896e-01 3106 2009 11 2.61578e+01 1.31716e+00 3761 2009 12 2.14157e+01 1.54914e+00 3507 2010 1 1.93222e+01 1.08116e+00 2754 2010 2 1.80629e+01 1.17781e+00 2342 2010 3 1.94854e+01 1.70030e+00 2205 2010 4 2.17945e+01 1.86286e+00 1592 2010 5 2.52989e+01 1.68480e+00 2158 2010 6 2.86918e+01 9.48542e-01 1540 2010 7 3.08037e+01 1.21227e+00 2157 2010 8 3.30757e+01 1.29132e+00 3843 2010 9 3.22951e+01 1.32602e+00 4619 2010 10 2.99534e+01 9.60479e-01 5052 2010 11 2.63100e+01 1.11173e+00 4534 2010 12 2.25474e+01 1.95234e+00 3204 2011 1 1.87544e+01 9.76094e-01 2993 2011 2 1.66084e+01 1.02302e+00 2416 2011 3 1.80565e+01 1.21243e+00 2883 2011 4 2.04861e+01 1.58053e+00 1119 2011 5 2.53517e+01 2.52264e+00 1797 2011 6 2.85126e+01 1.12507e+00 1579 2011 7 3.07839e+01 1.85353e+00 2826 2011 8 3.21685e+01 9.10564e-01 4692 2011 9 3.12812e+01 5.47807e-01 4503 2011 10 2.86604e+01 1.28631e+00 4614 2011 11 2.41470e+01 1.06037e+00 2638 2011 12 1.97432e+01 1.41087e+00 3893 2012 1 1.68412e+01 6.91984e-01 3041 2012 2 1.56804e+01 9.96148e-01 1975 2012 3 1.58676e+01 1.13595e+00 2387 2012 4 1.94254e+01 1.58614e+00 1433 2012 5 2.50679e+01 1.65023e+00 1143 2012 6 2.85237e+01 1.62264e+00 2129 2012 7 3.17106e+01 1.70681e+00 3259 2012 8 3.19263e+01 9.39668e-01 4167 2012 9 3.09713e+01 9.51491e-01 4532 2012 10 3.01183e+01 1.08251e+00 4611 2012 11 2.76417e+01 1.67205e+00 2584 2012 12 2.19551e+01 1.29542e+00 2756 2013 1 1.87005e+01 1.28217e+00 2643 2013 2 1.85964e+01 9.40499e-01 2992 2013 3 1.89610e+01 1.11007e+00 2435 2013 4 2.16030e+01 1.79974e+00 2001 2013 5 2.49742e+01 2.14480e+00 3149 2013 6 2.82308e+01 1.26487e+00 1781 2013 7 3.05956e+01 7.36308e-01 2888 2013 8 3.19768e+01 8.61179e-01 5104 2013 9 3.15387e+01 8.04033e-01 5554 2013 10 2.81426e+01 1.42913e+00 4405 2013 11 2.45237e+01 1.08160e+00 3280 2013 12 2.07802e+01 1.70299e+00 3432 2014 1 1.75027e+01 9.59142e-01 2568 2014 2 1.68430e+01 5.95917e-01 3105 2014 3 1.91215e+01 1.24383e+00 2205 2014 4 2.14825e+01 1.98136e+00 1622 2014 5 2.67825e+01 1.48379e+00 2900 2014 6 2.92427e+01 1.22874e+00 2849 2014 7 3.06749e+01 8.02771e-01 3594 2014 8 3.15197e+01 9.36396e-01 4665 2014 9 3.19405e+01 8.85641e-01 5832 2014 10 3.00815e+01 1.26721e+00 5288 2014 11 2.56206e+01 1.41845e+00 3430 2014 12 2.16252e+01 1.04994e+00 3317 2015 1 1.89641e+01 1.02141e+00 3118 2015 2 1.78837e+01 1.42793e+00 2041 2015 3 1.88535e+01 1.20278e+00 2502 2015 4 2.14858e+01 1.28572e+00 1777 2015 5 2.52222e+01 1.70776e+00 1619 2015 6 2.84656e+01 1.16046e+00 2359 2015 7 3.12354e+01 1.73704e+00 2975 2015 8 3.31635e+01 7.38031e-01 5634 2015 9 3.24197e+01 1.03198e+00 5306 2015 10 3.08192e+01 8.71324e-01 4780 2015 11 2.58081e+01 1.55363e+00 3871 2015 12 2.07854e+01 1.37167e+00 3148 2016 1 1.75972e+01 8.47589e-01 3705 2016 2 1.66259e+01 7.42188e-01 3307 2016 3 1.86898e+01 1.01941e+00 1937 2016 4 2.20742e+01 1.94513e+00 3149 2016 5 2.63523e+01 1.37964e+00 2909 2016 6 2.89589e+01 1.24162e+00 2930 2016 7 3.14236e+01 1.29039e+00 3191 2016 8 3.31293e+01 7.27616e-01 4890 2016 9 3.18920e+01 1.30268e+00 4692 2016 10 2.90475e+01 1.21991e+00 4545 2016 11 2.61631e+01 1.36512e+00 2645 2016 12 2.10008e+01 1.33676e+00 2452 2017 1 1.79045e+01 1.16735e+00 2594 2017 2 1.59488e+01 9.35587e-01 2442 2017 3 1.78721e+01 1.31606e+00 1770 2017 4 2.16490e+01 1.75206e+00 1454 2017 5 2.61807e+01 1.89485e+00 2523 2017 6 2.87793e+01 1.23012e+00 1969 2017 7 3.22084e+01 1.30098e+00 3872 2017 8 3.38989e+01 6.80114e-01 5046 2017 9 3.29562e+01 9.28212e-01 5333 2017 10 2.99512e+01 1.37303e+00 5007 2017 11 2.63738e+01 1.41842e+00 3863 2017 12 2.19288e+01 1.34321e+00 3864 2018 1 1.87175e+01 1.49061e+00 3589 2018 2 1.78788e+01 1.02404e+00 1720 2018 3 2.01436e+01 1.39265e+00 2778 2018 4 2.21229e+01 1.97246e+00 2008 2018 5 2.68733e+01 1.91930e+00 2860 2018 6 2.94311e+01 1.28955e+00 2804 2018 7 3.10298e+01 8.87048e-01 3415 2018 8 3.12741e+01 7.01678e-01 4362 2018 9 3.23784e+01 7.04225e-01 5304 2018 10 3.09089e+01 1.28928e+00 4739 2018 11 2.55760e+01 1.07868e+00 1659 2018 12 2.25158e+01 1.19090e+00 3095 2019 1 1.86300e+01 2.16142e+00 1429 2019 2 1.83927e+01 9.36894e-01 3002 2019 3 1.85661e+01 9.72286e-01 3416 2019 4 2.15081e+01 9.93748e-01 2782 2019 5 2.75262e+01 2.68962e+00 3297 2019 6 3.14882e+01 1.02924e+00 4607 2019 7 3.12878e+01 7.35326e-01 4226 2019 8 3.25119e+01 7.31476e-01 6085 2019 9 3.21314e+01 5.87469e-01 6737 2019 10 3.19615e+01 9.87622e-01 5029 2019 11 2.73621e+01 1.76560e+00 4233 2019 12 2.23181e+01 1.06054e+00 3693 2020 1 1.91724e+01 1.06797e+00 4291 2020 2 1.75450e+01 6.37684e-01 3966 2020 3 1.89769e+01 9.75495e-01 3737 2020 4 2.20396e+01 1.32484e+00 3021 2020 5 2.71633e+01 1.98356e+00 4524 2020 6 2.96211e+01 9.46515e-01 6985 2020 7 3.30031e+01 1.40479e+00 5686 2020 8 3.35598e+01 8.72386e-01 4779 2020 9 3.29926e+01 8.40179e-01 6304 2020 10 3.10869e+01 1.12821e+00 7368 2020 11 2.78641e+01 1.39822e+00 3696 2020 12 2.20094e+01 1.14713e+00 3965 2021 1 1.91189e+01 8.55062e-01 5017 2021 2 1.84026e+01 7.38160e-01 4079 2021 3 1.87294e+01 7.66095e-01 4380 2021 4 2.19475e+01 2.14740e+00 2902 2021 5 2.79081e+01 2.21677e+00 4748 2021 6 2.95867e+01 1.02950e+00 6134 2021 7 3.26685e+01 1.33297e+00 6500 2021 8 3.38228e+01 7.01720e-01 6791 2021 9 3.20717e+01 1.03843e+00 6401 2021 10 2.92782e+01 1.21560e+00 6539 2021 11 2.57683e+01 1.53355e+00 4989 2021 12 2.19669e+01 1.28463e+00 2654 2022 1 1.86337e+01 1.22919e+00 4113 2022 2 1.74123e+01 7.06120e-01 4794 2022 3 -7.01215e+01 2.86064e+02 3694 2022 4 2.10487e+01 1.01045e+00 1551 2022 5 2.53240e+01 1.31599e+00 3865 2022 6 2.95389e+01 9.51990e-01 5184 2022 7 3.09815e+01 1.24756e+00 3774 2022 8 3.35341e+01 7.97991e-01 5390 2022 9 3.26630e+01 1.02640e+00 5712 2022 10 3.03140e+01 6.75711e-01 4302 2022 11 2.70694e+01 1.24031e+00 2553 2022 12 2.29350e+01 1.65218e+00 4042 2023 1 1.88522e+01 7.94944e-01 2555 2023 2 1.75329e+01 6.64133e-01 2385 2023 3 1.98751e+01 9.71623e-01 4469 2023 4 2.25492e+01 1.87809e+00 4370 2023 5 2.59928e+01 1.52161e+00 4226 2023 6 2.95922e+01 9.61525e-01 5455 2023 7 3.18113e+01 1.34020e+00 5880 2023 8 3.38278e+01 8.12397e-01 6013 2023 9 3.30144e+01 7.48634e-01 6476 2023 10 3.12177e+01 1.12343e+00 5336 2023 11 2.69892e+01 1.70393e+00 3919 2023 12 2.28726e+01 1.33245e+00 4497 2024 1 1.99762e+01 8.81515e-01 4359 2024 2 1.93989e+01 5.76034e-01 4411 2024 3 1.96578e+01 7.21459e-01 3670 2024 4 2.21252e+01 9.58989e-01 714