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 6.12722e+01 3.72934e-01 489 2002 8 5.84193e+01 9.58821e-01 284 2002 9 5.26428e+01 2.05906e+00 391 2002 10 4.57607e+01 2.31273e+00 843 2002 11 3.85034e+01 1.88953e+00 716 2002 12 3.43885e+01 4.19673e-01 703 2003 1 3.61713e+01 1.48276e+00 960 2003 2 4.25967e+01 1.77159e+00 904 2003 3 5.13977e+01 2.15427e+00 713 2003 4 5.89529e+01 9.60440e-01 294 2003 5 6.11135e+01 5.65971e-01 378 2003 6 6.18370e+01 5.32159e-02 286 2003 7 6.12380e+01 4.03179e-01 257 2003 8 5.94799e+01 6.49462e-01 161 2003 9 5.39104e+01 1.73762e+00 440 2003 10 4.56557e+01 2.72743e+00 740 2003 11 3.79186e+01 1.64348e+00 575 2003 12 3.45098e+01 3.99737e-01 571 2004 1 3.67133e+01 1.33963e+00 676 2004 2 4.35965e+01 2.51411e+00 832 2004 3 5.22378e+01 2.48790e+00 704 2004 4 5.85613e+01 1.08133e+00 500 2004 5 6.15762e+01 7.51198e-01 320 2004 6 6.19228e+01 1.50692e-01 542 2004 7 6.14053e+01 3.78898e-01 331 2004 8 5.85138e+01 1.17848e+00 766 2004 9 5.15728e+01 1.54634e+00 253 2004 10 4.54671e+01 2.55705e+00 602 2004 11 3.84574e+01 1.81617e+00 733 2004 12 3.43335e+01 3.65055e-01 499 2005 1 3.72725e+01 1.48281e+00 856 2005 2 4.29878e+01 1.61428e+00 637 2005 3 5.22033e+01 2.32331e+00 528 2005 4 5.80980e+01 1.09032e+00 570 2005 5 6.14718e+01 9.11173e-01 376 2005 6 6.18592e+01 1.64714e-01 341 2005 7 6.14641e+01 5.02131e-01 294 2005 8 5.84393e+01 1.96057e+00 445 2005 9 5.38527e+01 1.51189e+00 578 2005 10 4.62126e+01 2.75941e+00 411 2005 11 3.93752e+01 1.63643e+00 543 2005 12 3.44902e+01 4.02097e-01 918 2006 1 3.63501e+01 1.65099e+00 827 2006 2 4.41819e+01 1.98650e+00 698 2006 3 5.13812e+01 2.60851e+00 851 2006 4 5.82001e+01 1.36907e+00 625 2006 5 6.14500e+01 4.48010e-01 530 2006 6 6.19572e+01 1.31791e-01 490 2006 7 6.10809e+01 3.36524e-01 384 2006 8 5.94221e+01 1.01600e+00 331 2006 9 5.22783e+01 1.80937e+00 347 2006 10 4.54948e+01 1.96487e+00 583 2006 11 3.75748e+01 1.42697e+00 491 2006 12 3.46367e+01 2.32225e-01 71 2007 1 3.68362e+01 1.45942e+00 451 2007 2 4.40549e+01 2.26469e+00 473 2007 3 5.07230e+01 2.19050e+00 498 2007 4 5.79241e+01 1.29537e+00 501 2007 5 6.08366e+01 5.26882e-01 384 2007 6 6.19178e+01 2.35568e-01 454 2007 7 6.12746e+01 3.15083e-01 358 2007 8 5.92733e+01 1.25596e+00 384 2007 9 5.27101e+01 2.14638e+00 560 2007 10 4.54647e+01 1.50488e+00 512 2007 11 3.92176e+01 1.34376e+00 704 2007 12 3.42781e+01 3.32439e-01 714 2008 1 3.66640e+01 1.67868e+00 741 2008 2 4.36608e+01 2.40771e+00 613 2008 3 5.16897e+01 2.41706e+00 575 2008 4 5.78585e+01 1.09564e+00 521 2008 5 6.15213e+01 5.21562e-01 450 2008 6 6.19388e+01 1.00028e-01 503 2008 7 6.04222e+01 1.87426e-01 216 2008 8 5.96747e+01 4.10429e-01 293 2008 9 5.28295e+01 1.56793e+00 361 2008 10 4.65221e+01 2.14318e+00 549 2008 11 3.77289e+01 1.88215e+00 719 2008 12 3.42540e+01 3.36852e-01 704 2009 1 3.74175e+01 1.78484e+00 591 2009 2 4.44558e+01 1.77495e+00 587 2009 3 5.06939e+01 1.91811e+00 640 2009 4 5.80734e+01 1.16802e+00 427 2009 5 6.12049e+01 5.05655e-01 602 2009 6 6.18904e+01 1.68280e-02 259 2009 7 6.11479e+01 4.36398e-01 293 2009 8 5.90619e+01 1.02961e+00 389 2009 9 5.37973e+01 2.11647e+00 314 2009 10 4.60012e+01 2.50614e+00 731 2009 11 3.81651e+01 1.63113e+00 465 2009 12 3.44817e+01 3.79498e-01 693 2010 1 3.59638e+01 1.47088e+00 382 2010 2 4.38350e+01 2.05009e+00 576 2010 3 5.45970e+01 1.31222e+00 218 2010 4 5.78100e+01 1.28240e+00 512 2010 5 6.12519e+01 4.75398e-01 461 2010 6 6.19026e+01 1.23270e-01 676 2010 7 6.10238e+01 4.71259e-01 426 2010 8 5.94054e+01 5.49562e-01 277 2010 9 5.46728e+01 8.39011e-01 269 2010 10 4.58073e+01 2.43600e+00 831 2010 11 3.85804e+01 1.61645e+00 777 2010 12 3.44264e+01 3.80879e-01 906 2011 1 3.56202e+01 1.04467e+00 539 2011 2 4.41056e+01 2.30840e+00 956 2011 3 5.14651e+01 2.17797e+00 763 2011 4 5.81865e+01 1.27942e+00 704 2011 5 6.10430e+01 5.31953e-01 493 2011 6 6.19665e+01 1.21989e-01 463 2011 7 6.11818e+01 4.90812e-01 487 2011 8 6.01087e+01 4.31550e-01 133 2011 9 5.33396e+01 1.34139e+00 411 2011 10 4.73246e+01 2.03966e+00 442 2011 11 3.87072e+01 2.01762e+00 893 2011 12 3.43740e+01 5.00925e-01 667 2012 1 3.64397e+01 1.31861e+00 717 2012 2 4.56555e+01 1.04648e+00 271 2012 3 5.12000e+01 2.77795e+00 508 2012 4 5.72412e+01 1.22740e+00 567 2012 5 6.12649e+01 5.18466e-01 434 2012 6 6.19727e+01 6.70570e-02 281 2012 7 6.11234e+01 6.72240e-01 254 2012 8 5.91010e+01 1.18754e+00 359 2012 9 5.39339e+01 2.17391e+00 695 2012 10 4.56049e+01 2.18457e+00 481 2012 11 3.85325e+01 1.78576e+00 833 2012 12 3.41863e+01 1.58948e-01 381 2013 1 3.64513e+01 1.54085e+00 497 2013 2 4.29583e+01 2.36080e+00 688 2013 3 5.21997e+01 2.61708e+00 704 2013 4 5.82041e+01 9.87577e-01 381 2013 5 6.12723e+01 5.31947e-01 512 2013 6 6.19444e+01 1.18051e-01 223 2013 7 6.08200e+01 3.92852e-01 320 2013 8 5.77812e+01 6.33595e-01 128 2013 9 5.18041e+01 1.64663e+00 385 2013 10 4.61361e+01 1.88831e+00 605 2013 11 3.80703e+01 1.57670e+00 302 2013 12 3.45808e+01 5.44042e-01 319 2014 1 3.71055e+01 1.59823e+00 533 2014 2 4.30294e+01 1.79009e+00 638 2014 3 5.09771e+01 2.04768e+00 768 2014 4 5.81046e+01 1.41434e+00 518 2014 5 6.06213e+01 4.18505e-01 175 2014 6 6.18407e+01 1.01842e-01 472 2014 7 6.08858e+01 5.80780e-01 309 2014 8 5.94378e+01 8.96615e-01 549 2014 9 5.26735e+01 1.52894e+00 212 2014 10 4.59249e+01 2.38444e+00 621 2014 11 3.82010e+01 2.00831e+00 726 2014 12 3.43414e+01 3.55140e-01 675 2015 1 3.70143e+01 1.90558e+00 489 2015 2 4.38545e+01 1.75499e+00 504 2015 3 5.15707e+01 2.35230e+00 880 2015 4 5.71250e+01 1.23982e+00 318 2015 5 6.11371e+01 4.86251e-01 569 2015 6 6.18104e+01 1.18553e-01 402 2015 7 6.12166e+01 3.83593e-01 450 2015 8 5.97310e+01 4.43895e-01 341 2015 9 5.40272e+01 1.60984e+00 305 2015 10 4.52659e+01 2.33478e+00 581 2015 11 3.86654e+01 1.77119e+00 511 2015 12 3.42682e+01 4.50063e-01 459 2016 1 3.61901e+01 1.91085e+00 130 2016 2 4.51187e+01 1.67737e+00 522 2016 3 5.20275e+01 2.31258e+00 631 2016 4 5.75634e+01 1.41640e+00 434 2016 5 6.12901e+01 5.22095e-01 511 2016 6 6.18172e+01 1.17077e-01 392 2016 7 6.12103e+01 4.66574e-01 499 2016 8 5.92920e+01 1.04478e+00 325 2016 9 5.26112e+01 1.86668e+00 564 2016 10 4.56762e+01 1.47601e+00 487 2016 11 3.78410e+01 1.40908e+00 825 2016 12 3.42714e+01 2.80069e-01 290 2017 1 3.73310e+01 1.15292e+00 547 2017 2 4.36765e+01 2.25304e+00 814 2017 3 5.12541e+01 1.73806e+00 514 2017 4 5.79748e+01 1.62812e+00 285 2017 5 6.13869e+01 6.45919e-01 603 2017 6 6.18471e+01 1.24616e-01 446 2017 7 6.15318e+01 2.75366e-01 333 2017 8 5.89021e+01 1.11471e+00 679 2017 9 5.26726e+01 1.52268e+00 406 2017 10 4.53069e+01 2.08249e+00 479 2017 11 3.87608e+01 1.95199e+00 1024 2017 12 3.43273e+01 3.81392e-01 1143 2018 1 3.64032e+01 1.75057e+00 520 2018 2 4.30654e+01 2.22967e+00 808 2018 3 5.18983e+01 2.66090e+00 726 2018 4 5.82617e+01 1.33302e+00 576 2018 5 6.06990e+01 3.10964e-01 170 2018 6 6.19163e+01 1.63161e-01 200 2018 7 6.13688e+01 3.64644e-01 547 2018 8 5.88657e+01 9.38824e-01 381 2018 9 5.23046e+01 1.39017e+00 421 2018 10 4.56127e+01 2.24588e+00 712 2018 11 3.80954e+01 1.74203e+00 533 2018 12 3.44753e+01 4.08104e-01 610 2019 1 3.59774e+01 1.45153e+00 578 2019 2 4.39675e+01 2.58825e+00 690 2019 3 5.19265e+01 2.93565e+00 596 2019 4 5.81876e+01 1.29680e+00 702 2019 5 6.09865e+01 6.61918e-01 512 2019 6 6.19876e+01 1.26325e-01 581 2019 7 6.10629e+01 2.89633e-01 423 2019 8 5.86874e+01 1.40077e+00 409 2019 9 5.29964e+01 1.50144e+00 390 2019 10 4.57115e+01 1.87782e+00 519 2019 11 3.84815e+01 2.26231e+00 682 2019 12 3.44376e+01 5.32200e-01 561 2020 1 3.62908e+01 1.72890e+00 802 2020 2 4.40071e+01 2.42142e+00 586 2020 3 5.24023e+01 2.27106e+00 534 2020 4 5.74625e+01 1.23263e+00 460 2020 5 6.13832e+01 6.58920e-01 384 2020 6 6.18055e+01 7.82398e-02 353 2020 7 6.14378e+01 4.42659e-01 492 2020 8 5.92119e+01 1.03078e+00 679 2020 9 5.28006e+01 2.07066e+00 431 2020 10 4.60974e+01 2.00379e+00 200 2020 11 3.75127e+01 1.26718e+00 390 2020 12 3.42914e+01 3.83632e-01 559 2021 1 3.71012e+01 1.61910e+00 650 2021 2 4.42045e+01 2.10412e+00 722 2021 3 5.15415e+01 2.39825e+00 864 2021 4 5.82522e+01 1.44151e+00 627 2021 5 6.13113e+01 5.91072e-01 724 2021 6 6.18327e+01 6.82867e-02 227 2021 7 6.11719e+01 3.65352e-01 454 2021 8 5.94174e+01 6.57137e-01 294 2021 9 5.19339e+01 2.14651e+00 538 2021 10 4.54767e+01 2.07381e+00 441 2021 11 3.79386e+01 2.01409e+00 621 2021 12 3.44204e+01 3.89368e-01 806 2022 1 3.62684e+01 1.59091e+00 627 2022 2 4.44128e+01 2.21782e+00 695 2022 3 5.26043e+01 2.13598e+00 504 2022 4 5.96665e+01 1.09987e-01 67 2022 5 6.10202e+01 5.39144e-01 671 2022 6 6.19056e+01 1.05762e-01 394 2022 7 6.15769e+01 6.17820e-02 203 2022 8 5.85254e+01 1.06557e+00 387 2022 9 5.33301e+01 2.11658e+00 630 2022 10 4.49589e+01 2.71348e+00 928 2022 11 3.82895e+01 2.06020e+00 768 2022 12 3.42509e+01 2.75558e-01 566 2023 1 3.58889e+01 1.49085e+00 873 2023 2 4.35646e+01 2.45744e+00 727 2023 3 5.18274e+01 2.75378e+00 855 2023 4 5.75288e+01 1.30218e+00 319 2023 5 6.10194e+01 4.62193e-01 592 2023 6 6.18587e+01 3.74236e-02 257 2023 7 6.13681e+01 5.08629e-01 275 2023 8 5.93110e+01 1.03939e+00 543 2023 9 5.30952e+01 1.52011e+00 384 2023 10 4.61431e+01 1.87017e+00 569 2023 11 3.79007e+01 1.82678e+00 740 2023 12 3.43254e+01 3.01920e-01 258 2024 1 3.79260e+01 1.64274e+00 347 2024 2 4.45968e+01 2.36609e+00 644 2024 3 5.17952e+01 2.27700e+00 453 2024 4 nan nan 0