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 5.92136e+01 8.52915e-02 260 2002 8 5.90223e+01 2.82942e-01 266 2002 9 5.60990e+01 1.05580e+00 217 2002 10 4.90772e+01 1.40664e+00 505 2002 11 4.46667e+01 1.51434e+00 959 2002 12 4.06625e+01 3.93323e-01 940 2003 1 4.30825e+01 1.43474e+00 657 2003 2 4.82459e+01 1.81390e+00 325 2003 3 5.51605e+01 1.60029e+00 786 2003 4 5.85079e+01 8.36367e-01 248 2003 5 5.92699e+01 1.10887e-01 203 2003 6 5.93115e+01 7.23510e-03 64 2003 7 5.90329e+01 1.26962e-02 124 2003 8 5.90132e+01 2.14135e-01 256 2003 9 5.57706e+01 1.56845e+00 492 2003 10 5.00413e+01 2.12252e+00 447 2003 11 4.35428e+01 1.83451e+00 505 2003 12 4.06227e+01 4.54407e-01 497 2004 1 4.26727e+01 1.18206e+00 920 2004 2 4.82787e+01 2.21242e+00 570 2004 3 5.60150e+01 1.58322e+00 581 2004 4 5.91615e+01 6.45568e-01 640 2004 5 5.97231e+01 5.12513e-01 105 2004 6 5.95030e+01 7.60059e-02 208 2004 7 5.92120e+01 1.59441e-01 321 2004 8 5.86948e+01 6.63976e-01 250 2004 9 5.52017e+01 9.66967e-01 217 2004 10 5.02347e+01 1.77791e+00 544 2004 11 4.30646e+01 1.13529e+00 769 2004 12 4.06326e+01 4.27643e-01 1101 2005 1 4.21460e+01 1.19481e+00 852 2005 2 4.87613e+01 1.62120e+00 927 2005 3 5.54411e+01 1.19847e+00 616 2005 4 5.91755e+01 8.53863e-01 570 2005 5 5.97053e+01 4.85617e-01 288 2005 6 nan nan 0 2005 7 5.89512e+01 2.38114e-01 140 2005 8 5.84568e+01 5.71551e-01 134 2005 9 5.49097e+01 1.02512e+00 264 2005 10 4.89196e+01 5.70641e-01 178 2005 11 4.39616e+01 1.56016e+00 670 2005 12 4.07203e+01 3.62854e-01 1007 2006 1 4.35342e+01 1.36158e+00 433 2006 2 4.87336e+01 1.80411e+00 893 2006 3 5.45463e+01 1.55293e+00 826 2006 4 5.93253e+01 7.98213e-01 256 2006 5 5.93406e+01 1.26501e-01 371 2006 6 5.94291e+01 4.49812e-03 64 2006 7 5.90692e+01 1.24753e-01 257 2006 8 nan nan 0 2006 9 5.41575e+01 6.99793e-01 448 2006 10 4.93589e+01 1.77521e+00 256 2006 11 4.39908e+01 1.63234e+00 841 2006 12 4.04687e+01 2.72213e-01 786 2007 1 4.25201e+01 1.29226e+00 1218 2007 2 4.88739e+01 1.58979e+00 448 2007 3 5.50078e+01 2.09277e+00 382 2007 4 5.88729e+01 6.16708e-01 396 2007 5 5.92729e+01 9.38334e-02 73 2007 6 5.96203e+01 1.04654e-01 334 2007 7 5.91282e+01 3.06566e-01 109 2007 8 5.92784e+01 2.09664e-01 241 2007 9 5.51836e+01 1.12197e+00 212 2007 10 4.93128e+01 6.66490e-01 237 2007 11 4.33339e+01 1.24175e+00 539 2007 12 4.06664e+01 4.68080e-01 832 2008 1 4.24665e+01 1.30427e+00 1024 2008 2 4.84611e+01 1.80991e+00 730 2008 3 5.54799e+01 1.31641e+00 576 2008 4 5.92202e+01 1.73157e-01 256 2008 5 5.93026e+01 1.41345e-01 308 2008 6 5.95868e+01 4.87095e-02 192 2008 7 5.90291e+01 1.47322e-01 256 2008 8 5.90331e+01 5.33456e-01 320 2008 9 5.46772e+01 1.14386e+00 256 2008 10 4.98747e+01 1.88727e+00 703 2008 11 4.36881e+01 1.45591e+00 901 2008 12 4.07103e+01 3.75734e-01 1142 2009 1 4.27748e+01 1.52405e+00 803 2009 2 4.88113e+01 1.57482e+00 485 2009 3 5.56334e+01 1.36015e+00 663 2009 4 5.90811e+01 6.89531e-01 576 2009 5 5.91983e+01 1.12142e-01 320 2009 6 5.93310e+01 3.52651e-02 128 2009 7 5.92387e+01 1.39571e-01 164 2009 8 5.91712e+01 3.37667e-01 448 2009 9 5.47611e+01 1.18461e+00 428 2009 10 4.98905e+01 1.67704e+00 709 2009 11 4.42465e+01 1.64673e+00 788 2009 12 4.05827e+01 3.42812e-01 621 2010 1 4.32142e+01 1.36507e+00 592 2010 2 4.81530e+01 1.73136e+00 723 2010 3 5.59807e+01 9.56504e-01 448 2010 4 5.88969e+01 7.39820e-01 309 2010 5 5.94372e+01 4.66501e-01 228 2010 6 5.93871e+01 8.20592e-02 192 2010 7 5.91195e+01 2.31899e-01 128 2010 8 5.87115e+01 4.30750e-01 199 2010 9 5.59089e+01 5.25782e-01 166 2010 10 4.90823e+01 9.01900e-01 299 2010 11 4.33560e+01 1.35948e+00 704 2010 12 4.10359e+01 4.84977e-01 640 2011 1 4.32564e+01 1.56205e+00 576 2011 2 4.86137e+01 2.03358e+00 679 2011 3 5.44147e+01 1.55341e+00 924 2011 4 5.92253e+01 5.47789e-01 636 2011 5 5.92166e+01 1.16914e-01 256 2011 6 5.95005e+01 1.91713e-02 128 2011 7 5.89140e+01 1.57184e-01 192 2011 8 5.89511e+01 6.47058e-01 264 2011 9 5.50396e+01 1.71247e+00 419 2011 10 4.92802e+01 1.76281e+00 397 2011 11 4.32118e+01 1.03545e+00 841 2011 12 4.07937e+01 3.72264e-01 690 2012 1 4.27771e+01 1.27436e+00 1133 2012 2 4.85902e+01 1.97878e+00 844 2012 3 5.47585e+01 1.53413e+00 648 2012 4 5.95565e+01 3.37880e-01 372 2012 5 5.91926e+01 6.46936e-02 288 2012 6 5.96422e+01 2.55703e-03 64 2012 7 5.92692e+01 2.66056e-01 170 2012 8 5.88125e+01 1.72079e-01 128 2012 9 5.54807e+01 1.33850e+00 464 2012 10 5.08401e+01 1.96370e+00 399 2012 11 4.41312e+01 1.60986e+00 779 2012 12 4.06603e+01 3.48266e-01 780 2013 1 4.27446e+01 1.47552e+00 631 2013 2 4.80847e+01 1.76993e+00 694 2013 3 5.50938e+01 1.41897e+00 681 2013 4 5.95788e+01 6.35432e-01 320 2013 5 5.91886e+01 9.01036e-02 189 2013 6 5.94032e+01 5.87928e-03 5 2013 7 5.89996e+01 2.17910e-01 320 2013 8 5.91103e+01 6.76159e-01 256 2013 9 5.40548e+01 3.10672e-01 125 2013 10 4.93976e+01 1.89217e+00 320 2013 11 4.36195e+01 1.08864e+00 836 2013 12 4.05080e+01 3.13322e-01 390 2014 1 4.27354e+01 1.47932e+00 849 2014 2 4.83241e+01 1.91299e+00 824 2014 3 5.52705e+01 1.59351e+00 456 2014 4 5.86264e+01 9.63766e-01 336 2014 5 5.95426e+01 5.21287e-01 227 2014 6 5.95469e+01 1.06533e-01 256 2014 7 5.90386e+01 1.50817e-01 264 2014 8 5.95351e+01 9.29558e-02 88 2014 9 5.55269e+01 5.55620e-01 204 2014 10 4.96579e+01 1.59536e+00 576 2014 11 4.35209e+01 1.32958e+00 848 2014 12 4.07525e+01 3.89009e-01 685 2015 1 4.24678e+01 1.08713e+00 608 2015 2 4.82278e+01 1.95740e+00 675 2015 3 5.50638e+01 1.54364e+00 704 2015 4 5.89903e+01 6.82340e-01 569 2015 5 6.04460e+01 0.00000e+00 2 2015 6 nan nan 0 2015 7 5.89187e+01 4.83265e-02 64 2015 8 5.89973e+01 4.18128e-01 448 2015 9 5.56335e+01 1.71800e+00 338 2015 10 4.91931e+01 1.46635e+00 636 2015 11 4.42700e+01 1.25630e+00 428 2015 12 4.05441e+01 2.88777e-01 651 2016 1 4.27211e+01 1.30867e+00 1047 2016 2 4.84610e+01 1.93861e+00 890 2016 3 5.59617e+01 1.14293e+00 320 2016 4 5.91291e+01 4.54278e-01 433 2016 5 5.96171e+01 5.70428e-01 289 2016 6 5.94986e+01 4.06208e-02 194 2016 7 5.91069e+01 1.16176e-01 192 2016 8 5.89720e+01 3.28589e-01 190 2016 9 5.51961e+01 1.24345e+00 448 2016 10 4.94898e+01 1.22992e+00 357 2016 11 4.39536e+01 1.76089e+00 323 2016 12 4.06248e+01 3.28515e-01 829 2017 1 4.28554e+01 1.20904e+00 935 2017 2 4.86864e+01 1.58368e+00 955 2017 3 5.47951e+01 1.94843e+00 530 2017 4 5.89098e+01 7.40696e-01 576 2017 5 5.91611e+01 1.16359e-01 314 2017 6 5.94859e+01 5.89760e-02 384 2017 7 5.90240e+01 1.32720e-01 340 2017 8 5.90923e+01 5.11979e-01 311 2017 9 5.61008e+01 1.03112e+00 193 2017 10 4.99901e+01 7.32119e-01 249 2017 11 4.31979e+01 1.61355e+00 484 2017 12 4.05198e+01 3.37183e-01 940 2018 1 4.32669e+01 1.36065e+00 749 2018 2 4.87244e+01 1.94246e+00 788 2018 3 5.52005e+01 2.00564e+00 673 2018 4 5.88288e+01 7.14618e-01 320 2018 5 5.93260e+01 5.76979e-02 324 2018 6 5.94512e+01 8.53744e-02 319 2018 7 5.90783e+01 8.71455e-02 102 2018 8 5.89864e+01 3.22534e-01 341 2018 9 5.46507e+01 1.16086e+00 407 2018 10 4.85084e+01 9.60731e-01 541 2018 11 4.37865e+01 1.47277e+00 905 2018 12 4.06878e+01 3.84151e-01 759 2019 1 4.27150e+01 1.40687e+00 787 2019 2 4.84307e+01 1.89304e+00 725 2019 3 5.54980e+01 1.44800e+00 622 2019 4 5.90806e+01 8.29424e-01 480 2019 5 5.91947e+01 6.96267e-02 128 2019 6 5.94795e+01 4.90929e-02 172 2019 7 5.90605e+01 1.31958e-01 333 2019 8 5.83855e+01 3.58053e-01 129 2019 9 5.61731e+01 2.26352e-01 11 2019 10 4.89663e+01 1.39508e+00 392 2019 11 4.39932e+01 1.57453e+00 900 2019 12 4.06323e+01 3.87324e-01 709 2020 1 4.25925e+01 1.35845e+00 716 2020 2 4.85503e+01 2.07550e+00 646 2020 3 5.45279e+01 1.77984e+00 650 2020 4 5.91244e+01 7.43669e-01 558 2020 5 5.92533e+01 1.86471e-01 269 2020 6 5.95347e+01 1.12370e-01 496 2020 7 5.92160e+01 1.66985e-01 285 2020 8 5.92997e+01 1.73682e-01 128 2020 9 5.48787e+01 8.40853e-01 320 2020 10 4.88405e+01 8.04705e-01 301 2020 11 4.32272e+01 1.34226e+00 585 2020 12 4.05893e+01 3.77451e-01 1049 2021 1 4.30546e+01 1.18530e+00 735 2021 2 4.92666e+01 1.65092e+00 512 2021 3 5.52091e+01 1.67857e+00 650 2021 4 5.92263e+01 6.35143e-01 512 2021 5 5.93370e+01 3.33617e-01 464 2021 6 5.94610e+01 1.41595e-01 256 2021 7 5.91472e+01 2.30125e-01 196 2021 8 5.88509e+01 4.98628e-01 256 2021 9 5.46054e+01 1.13127e+00 611 2021 10 4.83227e+01 1.51102e+00 305 2021 11 4.38915e+01 1.40095e+00 745 2021 12 4.05165e+01 2.96290e-01 1060 2022 1 4.27082e+01 1.58837e+00 845 2022 2 4.84546e+01 1.77831e+00 931 2022 3 5.47192e+01 1.60570e+00 552 2022 4 5.97978e+01 1.53792e-01 128 2022 5 5.91572e+01 6.43297e-02 149 2022 6 5.94391e+01 1.07912e-01 384 2022 7 5.90480e+01 1.00332e-01 256 2022 8 5.85507e+01 2.84407e-01 377 2022 9 5.57095e+01 2.00334e+00 256 2022 10 5.07911e+01 1.37818e+00 417 2022 11 4.33439e+01 1.22631e+00 601 2022 12 4.07150e+01 3.71506e-01 1116 2023 1 4.29603e+01 1.42565e+00 1094 2023 2 4.90521e+01 2.15724e+00 659 2023 3 5.47384e+01 1.89141e+00 640 2023 4 5.93009e+01 6.94071e-01 544 2023 5 5.95131e+01 5.09064e-01 400 2023 6 5.94924e+01 5.80036e-02 118 2023 7 5.89118e+01 8.10187e-02 192 2023 8 5.84805e+01 4.37982e-01 384 2023 9 5.53070e+01 1.50725e+00 384 2023 10 5.06075e+01 1.44350e+00 489 2023 11 4.34726e+01 1.30646e+00 590 2023 12 4.07558e+01 5.13886e-01 912 2024 1 4.25493e+01 1.34879e+00 853 2024 2 4.91746e+01 1.95203e+00 673 2024 3 5.46065e+01 1.73392e+00 512 2024 4 5.88866e+01 5.86534e-01 384 2024 5 5.93470e+01 4.42410e-01 365 2024 6 5.94317e+01 2.60252e-03 28 2024 7 5.91866e+01 3.58665e-02 184 2024 8 5.83926e+01 6.92068e-01 256 2024 9 5.41820e+01 8.19767e-01 268 2024 10 5.05789e+01 1.78617e+00 463 2024 11 4.55641e+01 4.57540e-01 128