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 6.17768e+01 3.20209e-01 390 2002 8 5.84179e+01 6.78566e-01 180 2002 9 5.20215e+01 1.71292e+00 268 2002 10 4.50129e+01 2.29519e+00 809 2002 11 3.80885e+01 2.01088e+00 429 2002 12 3.37240e+01 4.26009e-01 307 2003 1 3.53858e+01 1.16852e+00 512 2003 2 4.37888e+01 2.42638e+00 761 2003 3 5.06127e+01 2.79310e+00 374 2003 4 5.78297e+01 1.30121e+00 512 2003 5 6.16883e+01 6.84936e-01 414 2003 6 6.23149e+01 7.65436e-02 222 2003 7 6.13434e+01 6.35146e-01 142 2003 8 5.84810e+01 1.15792e+00 386 2003 9 5.34634e+01 6.44673e-01 188 2003 10 4.43107e+01 1.97617e+00 609 2003 11 3.74875e+01 1.61756e+00 896 2003 12 3.36529e+01 3.46072e-01 424 2004 1 3.60466e+01 1.58431e+00 657 2004 2 4.26052e+01 2.27021e+00 610 2004 3 5.23917e+01 2.09701e+00 832 2004 4 5.86288e+01 1.42346e+00 482 2004 5 6.19313e+01 4.25680e-01 640 2004 6 6.24419e+01 1.10235e-01 448 2004 7 6.21517e+01 1.82435e-01 195 2004 8 5.87328e+01 1.18984e+00 555 2004 9 5.24700e+01 2.23053e+00 409 2004 10 4.43954e+01 2.53152e+00 944 2004 11 3.71028e+01 1.79600e+00 708 2004 12 3.37568e+01 4.78490e-01 550 2005 1 3.61916e+01 1.48822e+00 768 2005 2 4.24773e+01 1.85607e+00 844 2005 3 5.17045e+01 2.71919e+00 508 2005 4 5.80882e+01 1.71330e+00 475 2005 5 6.18029e+01 4.93213e-01 346 2005 6 6.24796e+01 1.38328e-01 232 2005 7 6.13852e+01 4.61992e-01 721 2005 8 5.90073e+01 1.15751e+00 402 2005 9 5.33960e+01 1.54965e+00 665 2005 10 4.69561e+01 1.10462e+00 308 2005 11 3.81207e+01 9.62629e-01 355 2005 12 3.36098e+01 1.81768e-01 472 2006 1 3.63818e+01 2.10118e+00 471 2006 2 4.38643e+01 1.75718e+00 704 2006 3 5.07760e+01 2.23737e+00 925 2006 4 5.80193e+01 1.47231e+00 708 2006 5 6.16218e+01 6.30620e-01 617 2006 6 6.23940e+01 1.14793e-01 460 2006 7 6.14029e+01 4.24467e-01 318 2006 8 5.90999e+01 9.00539e-01 442 2006 9 5.33414e+01 1.54530e+00 414 2006 10 4.53300e+01 2.26245e+00 560 2006 11 3.66833e+01 2.09443e+00 432 2006 12 3.34583e+01 2.27637e-01 542 2007 1 3.57681e+01 1.38993e+00 670 2007 2 4.33663e+01 2.52715e+00 494 2007 3 5.10948e+01 2.18517e+00 825 2007 4 5.79444e+01 1.62069e+00 896 2007 5 6.12749e+01 6.36399e-01 600 2007 6 6.24840e+01 8.46269e-02 336 2007 7 6.18167e+01 3.40394e-01 640 2007 8 5.88747e+01 1.19147e+00 538 2007 9 5.14513e+01 1.56553e+00 144 2007 10 4.53149e+01 2.24388e+00 456 2007 11 3.77598e+01 1.59890e+00 549 2007 12 3.35698e+01 3.17341e-01 912 2008 1 3.71989e+01 1.42564e+00 366 2008 2 4.27384e+01 2.87925e+00 701 2008 3 5.18043e+01 2.45910e+00 640 2008 4 5.80302e+01 1.38023e+00 817 2008 5 6.10993e+01 6.47151e-01 297 2008 6 6.24350e+01 1.00374e-01 534 2008 7 6.16142e+01 5.77680e-01 388 2008 8 5.93914e+01 9.30709e-01 150 2008 9 5.26243e+01 1.79019e+00 390 2008 10 4.65221e+01 1.73223e+00 395 2008 11 3.69127e+01 1.64926e+00 838 2008 12 3.37215e+01 4.23909e-01 634 2009 1 3.63472e+01 1.65810e+00 609 2009 2 4.37329e+01 2.45028e+00 784 2009 3 5.06711e+01 1.67560e+00 704 2009 4 5.88323e+01 1.39832e+00 490 2009 5 6.14822e+01 5.02312e-01 456 2009 6 6.24933e+01 1.33154e-01 348 2009 7 6.14427e+01 4.95084e-01 309 2009 8 5.87565e+01 1.12466e+00 577 2009 9 5.21645e+01 2.29632e+00 442 2009 10 4.55262e+01 2.47775e+00 734 2009 11 3.72248e+01 2.22297e+00 381 2009 12 3.36028e+01 2.87938e-01 545 2010 1 3.75741e+01 1.23698e+00 165 2010 2 4.32365e+01 2.73632e+00 250 2010 3 5.28920e+01 1.57153e+00 576 2010 4 5.69843e+01 8.99911e-01 384 2010 5 6.16305e+01 7.59334e-01 501 2010 6 6.24131e+01 1.04365e-01 610 2010 7 6.17005e+01 3.86823e-01 279 2010 8 5.92977e+01 1.13173e+00 531 2010 9 5.30482e+01 1.47448e+00 291 2010 10 4.46442e+01 2.44700e+00 986 2010 11 3.72924e+01 1.65531e+00 810 2010 12 3.36604e+01 2.54545e-01 117 2011 1 3.68776e+01 2.21995e+00 321 2011 2 4.35757e+01 2.47199e+00 1097 2011 3 5.08300e+01 1.99468e+00 894 2011 4 5.76997e+01 1.34788e+00 703 2011 5 6.16242e+01 6.49108e-01 764 2011 6 6.23990e+01 5.15104e-02 405 2011 7 6.13275e+01 4.18392e-01 655 2011 8 5.93102e+01 1.04215e+00 540 2011 9 5.27986e+01 8.14588e-01 332 2011 10 4.58287e+01 2.79629e+00 198 2011 11 3.76712e+01 1.95080e+00 769 2011 12 3.35378e+01 3.42036e-01 1030 2012 1 3.59320e+01 1.47008e+00 894 2012 2 4.47388e+01 1.81941e+00 662 2012 3 5.09557e+01 2.31078e+00 891 2012 4 5.76558e+01 1.60041e+00 755 2012 5 6.16008e+01 5.55592e-01 576 2012 6 6.24576e+01 1.04025e-01 320 2012 7 6.16401e+01 6.09809e-01 240 2012 8 5.97966e+01 5.88781e-01 381 2012 9 5.22488e+01 2.62909e+00 448 2012 10 4.52417e+01 1.70676e+00 554 2012 11 3.78384e+01 1.73693e+00 811 2012 12 3.35465e+01 3.24715e-01 592 2013 1 3.65380e+01 1.55986e+00 685 2013 2 4.25612e+01 2.15076e+00 467 2013 3 5.24788e+01 2.34371e+00 576 2013 4 5.79578e+01 1.34840e+00 640 2013 5 6.17315e+01 4.95788e-01 502 2013 6 6.24094e+01 1.16840e-01 384 2013 7 6.13640e+01 4.94978e-01 386 2013 8 5.89010e+01 1.24924e+00 445 2013 9 5.15153e+01 1.40374e+00 193 2013 10 4.45806e+01 2.19732e+00 673 2013 11 3.79640e+01 1.94299e+00 483 2013 12 3.36890e+01 4.67242e-01 689 2014 1 3.62872e+01 1.73065e+00 418 2014 2 4.30401e+01 2.44805e+00 842 2014 3 5.11813e+01 2.24499e+00 619 2014 4 5.85468e+01 1.55603e+00 576 2014 5 6.16844e+01 5.35689e-01 710 2014 6 6.24213e+01 1.38551e-01 300 2014 7 6.17855e+01 1.92687e-01 215 2014 8 5.87599e+01 1.12322e+00 498 2014 9 5.43962e+01 1.93223e+00 177 2014 10 4.55389e+01 2.22859e+00 836 2014 11 3.78001e+01 2.13379e+00 738 2014 12 3.35525e+01 3.16797e-01 830 2015 1 3.61326e+01 1.93263e+00 559 2015 2 4.26876e+01 1.60105e+00 562 2015 3 5.03434e+01 2.17330e+00 787 2015 4 5.69394e+01 1.32286e+00 516 2015 5 6.15792e+01 5.37686e-01 763 2015 6 6.23594e+01 9.57374e-02 375 2015 7 6.19502e+01 1.51170e-01 205 2015 8 5.91237e+01 9.75128e-01 527 2015 9 5.19937e+01 1.97321e+00 304 2015 10 4.60893e+01 1.86626e+00 690 2015 11 3.71968e+01 2.02028e+00 654 2015 12 3.33956e+01 3.70599e-01 562 2016 1 3.45724e+01 8.22980e-01 199 2016 2 4.49769e+01 1.71811e+00 402 2016 3 5.12738e+01 2.07466e+00 397 2016 4 5.82252e+01 1.53802e+00 512 2016 5 6.13448e+01 6.14673e-01 540 2016 6 6.22660e+01 9.79360e-02 383 2016 7 6.16671e+01 5.57289e-01 662 2016 8 5.91588e+01 1.19296e+00 515 2016 9 5.23368e+01 1.99097e+00 795 2016 10 4.50085e+01 2.07638e+00 962 2016 11 3.73985e+01 1.97525e+00 1073 2016 12 3.34514e+01 3.53452e-01 996 2017 1 3.55725e+01 8.91084e-01 718 2017 2 4.36265e+01 2.36338e+00 881 2017 3 5.13673e+01 2.21442e+00 872 2017 4 5.73256e+01 1.31430e+00 384 2017 5 6.16469e+01 6.10277e-01 635 2017 6 6.22891e+01 7.88699e-02 132 2017 7 6.17212e+01 3.99540e-01 326 2017 8 5.91294e+01 1.13223e+00 406 2017 9 5.19129e+01 1.45249e+00 354 2017 10 4.44225e+01 1.79715e+00 357 2017 11 3.79448e+01 1.96836e+00 971 2017 12 3.34932e+01 3.48487e-01 1054 2018 1 3.60229e+01 1.65225e+00 738 2018 2 4.34689e+01 2.20019e+00 999 2018 3 5.12420e+01 2.60083e+00 1001 2018 4 5.76948e+01 1.57001e+00 832 2018 5 6.11530e+01 4.27261e-01 384 2018 6 6.23784e+01 8.02524e-02 383 2018 7 6.16387e+01 4.65531e-01 552 2018 8 5.86954e+01 1.16265e+00 358 2018 9 5.17136e+01 2.15582e+00 416 2018 10 4.38757e+01 1.84605e+00 844 2018 11 3.78448e+01 9.78979e-01 444 2018 12 3.37280e+01 4.93063e-01 184 2019 1 3.58108e+01 1.76231e+00 442 2019 2 4.32675e+01 2.01696e+00 832 2019 3 5.16267e+01 2.52644e+00 707 2019 4 5.81737e+01 1.48650e+00 404 2019 5 6.15163e+01 7.30569e-01 750 2019 6 6.23897e+01 9.50351e-02 768 2019 7 6.13843e+01 5.00975e-01 576 2019 8 5.82042e+01 1.10711e+00 320 2019 9 5.15345e+01 1.99735e+00 541 2019 10 4.55151e+01 2.85856e+00 570 2019 11 3.63690e+01 1.54669e+00 468 2019 12 3.36653e+01 4.67494e-01 559 2020 1 3.53141e+01 1.42624e+00 902 2020 2 4.39287e+01 1.77237e+00 636 2020 3 5.17399e+01 2.09050e+00 1088 2020 4 5.75993e+01 1.64619e+00 334 2020 5 6.11443e+01 4.23522e-01 320 2020 6 6.23778e+01 6.94733e-02 458 2020 7 6.13871e+01 5.37664e-01 247 2020 8 5.89810e+01 1.20461e+00 526 2020 9 5.30742e+01 2.37312e+00 265 2020 10 4.43512e+01 1.74344e+00 299 2020 11 3.69432e+01 1.92435e+00 729 2020 12 3.34918e+01 3.68178e-01 555 2021 1 3.66266e+01 1.79474e+00 925 2021 2 4.35080e+01 2.24678e+00 836 2021 3 5.13774e+01 2.25478e+00 1022 2021 4 5.80483e+01 1.65296e+00 640 2021 5 6.21462e+01 4.45706e-01 317 2021 6 6.23468e+01 2.03562e-02 256 2021 7 6.15658e+01 5.72659e-01 455 2021 8 5.95509e+01 6.86882e-01 502 2021 9 5.13965e+01 2.09487e+00 585 2021 10 4.55588e+01 1.73221e+00 505 2021 11 3.64326e+01 1.72836e+00 662 2021 12 3.33914e+01 2.47518e-01 834 2022 1 3.44295e+01 5.80981e-01 566 2022 2 4.42346e+01 2.12867e+00 835 2022 3 5.07913e+01 2.43939e+00 849 2022 4 5.95984e+01 5.02101e-01 256 2022 5 6.11266e+01 6.23980e-01 514 2022 6 6.23650e+01 1.21891e-01 585 2022 7 6.17844e+01 3.43560e-01 272 2022 8 5.74396e+01 6.65206e-01 175 2022 9 5.30560e+01 2.59812e+00 166 2022 10 4.25487e+01 1.03402e+00 564 2022 11 3.76485e+01 1.85772e+00 641 2022 12 3.37102e+01 3.60032e-01 785 2023 1 3.56559e+01 1.63178e+00 922 2023 2 4.35807e+01 2.42355e+00 1188 2023 3 5.12682e+01 2.41463e+00 1007 2023 4 5.71197e+01 1.62273e+00 320 2023 5 6.15651e+01 6.05182e-01 692 2023 6 6.24477e+01 8.05879e-02 305 2023 7 6.18490e+01 6.21105e-01 384 2023 8 5.90535e+01 9.99292e-01 482 2023 9 5.36367e+01 1.90202e+00 585 2023 10 4.34344e+01 1.85366e+00 497 2023 11 3.73022e+01 1.73413e+00 639 2023 12 3.35732e+01 3.48853e-01 450 2024 1 3.72783e+01 6.12084e-01 317 2024 2 4.39701e+01 2.48311e+00 963 2024 3 5.26422e+01 1.96954e+00 623 2024 4 nan nan 0