YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.84881e+01 3.16081e-01 32 2000 3 2.06985e+01 1.46310e+00 166 2000 4 2.19537e+01 1.84796e+00 128 2000 5 2.60697e+01 2.03175e+00 163 2000 6 2.87629e+01 7.92392e-01 96 2000 7 2.97942e+01 9.07362e-01 112 2000 8 2.93469e+01 9.32456e-01 32 2000 9 2.64343e+01 1.42571e+00 80 2000 10 2.35531e+01 1.09340e+00 194 2000 11 2.07679e+01 2.58173e+00 113 2000 12 1.76711e+01 7.06657e-01 32 2001 1 1.24870e+01 4.80744e-01 35 2001 2 1.84001e+01 1.64820e+00 70 2001 3 1.60431e+01 3.93356e-01 32 2001 4 2.08189e+01 2.22693e+00 153 2001 5 2.51955e+01 1.64926e+00 224 2001 6 2.67240e+01 7.24378e-01 48 2001 7 2.61483e+01 1.97897e+00 32 2001 8 2.84313e+01 1.91181e+00 157 2001 9 2.65451e+01 1.29804e+00 85 2001 10 2.14071e+01 2.17360e+00 124 2001 11 1.96296e+01 1.22620e+00 208 2001 12 2.00488e+01 1.81212e+00 154 2002 1 1.43667e+01 7.66288e-01 24 2002 2 1.43969e+01 9.47910e-01 80 2002 3 1.78476e+01 4.02294e+00 37 2002 4 2.44473e+01 2.38469e+00 157 2002 5 2.68219e+01 2.00916e+00 144 2002 6 2.82195e+01 1.14635e+00 123 2002 7 2.88338e+01 1.79776e+00 469 2002 8 2.91171e+01 1.30817e+00 559 2002 9 2.85097e+01 1.34937e+00 376 2002 10 2.72661e+01 2.28818e+00 464 2002 11 2.03421e+01 2.10204e+00 300 2002 12 1.51685e+01 1.32360e+00 108 2003 1 1.27895e+01 1.15654e+00 220 2003 2 1.52917e+01 1.41085e+00 281 2003 3 1.94610e+01 1.77951e+00 322 2003 4 2.06947e+01 2.22780e+00 637 2003 5 2.55368e+01 1.44032e+00 624 2003 6 2.79343e+01 1.46693e+00 407 2003 7 2.82254e+01 1.37518e+00 392 2003 8 2.78567e+01 1.20240e+00 420 2003 9 2.73816e+01 1.16636e+00 497 2003 10 2.31663e+01 1.00963e+00 542 2003 11 2.12587e+01 1.98866e+00 619 2003 12 1.56195e+01 1.39455e+00 139 2004 1 1.38563e+01 9.66241e-01 325 2004 2 1.38800e+01 1.60254e+00 192 2004 3 1.86809e+01 2.15535e+00 774 2004 4 2.09906e+01 2.23006e+00 638 2004 5 2.64313e+01 1.97163e+00 879 2004 6 2.90595e+01 1.42183e+00 596 2004 7 2.94726e+01 1.65416e+00 530 2004 8 2.99407e+01 1.39075e+00 532 2004 9 2.73280e+01 2.27610e+00 559 2004 10 2.49167e+01 1.46799e+00 626 2004 11 2.21690e+01 2.55426e+00 450 2004 12 1.64307e+01 1.82839e+00 147 2005 1 1.42840e+01 1.32926e+00 167 2005 2 1.47728e+01 1.25009e+00 318 2005 3 1.65971e+01 1.96242e+00 555 2005 4 1.99531e+01 1.42132e+00 534 2005 5 2.47546e+01 2.98038e+00 731 2005 6 2.80764e+01 1.35599e+00 530 2005 7 2.87145e+01 1.55699e+00 656 2005 8 2.89590e+01 1.74168e+00 486 2005 9 2.76056e+01 1.79553e+00 583 2005 10 2.53142e+01 1.95609e+00 570 2005 11 2.09517e+01 2.00896e+00 393 2005 12 1.58537e+01 1.91678e+00 232 2006 1 1.51018e+01 1.68248e+00 379 2006 2 1.48635e+01 1.86238e+00 381 2006 3 1.84607e+01 1.60097e+00 686 2006 4 2.30693e+01 2.41510e+00 725 2006 5 2.54516e+01 2.04651e+00 810 2006 6 2.87043e+01 1.61198e+00 820 2006 7 2.99981e+01 1.76593e+00 556 2006 8 3.02060e+01 1.13627e+00 659 2006 9 2.84343e+01 1.64561e+00 659 2006 10 2.44502e+01 2.45035e+00 793 2006 11 1.87024e+01 2.05936e+00 339 2006 12 1.66742e+01 1.35811e+00 170 2007 1 1.52999e+01 1.43403e+00 104 2007 2 1.38484e+01 1.78323e+00 380 2007 3 1.93104e+01 2.30392e+00 794 2007 4 2.14457e+01 2.10147e+00 611 2007 5 2.46874e+01 1.35510e+00 853 2007 6 2.81805e+01 1.86169e+00 573 2007 7 2.97190e+01 1.31916e+00 541 2007 8 3.03469e+01 1.50167e+00 585 2007 9 2.84342e+01 1.46829e+00 577 2007 10 2.56914e+01 1.69301e+00 492 2007 11 1.92861e+01 1.35476e+00 539 2007 12 1.77374e+01 1.66793e+00 285 2008 1 1.50516e+01 1.59572e+00 101 2008 2 1.61058e+01 1.43815e+00 383 2008 3 1.79159e+01 1.95585e+00 608 2008 4 2.14239e+01 2.08327e+00 604 2008 5 2.51008e+01 1.89674e+00 776 2008 6 2.93310e+01 1.25308e+00 654 2008 7 2.88818e+01 1.61728e+00 549 2008 8 2.83491e+01 1.27618e+00 359 2008 9 2.76976e+01 2.23205e+00 529 2008 10 2.37258e+01 2.07716e+00 685 2008 11 1.75156e+01 1.97061e+00 415 2008 12 1.56498e+01 1.32532e+00 260 2009 1 1.55650e+01 2.05052e+00 369 2009 2 1.45458e+01 1.93173e+00 539 2009 3 1.83363e+01 2.40232e+00 574 2009 4 2.09265e+01 2.34925e+00 609 2009 5 2.52861e+01 1.64333e+00 562 2009 6 2.82210e+01 2.15210e+00 711 2009 7 2.87066e+01 1.48223e+00 634 2009 8 2.90787e+01 1.44879e+00 478 2009 9 2.81917e+01 1.35399e+00 533 2009 10 2.53526e+01 2.98516e+00 600 2009 11 1.84357e+01 1.73699e+00 290 2009 12 1.34790e+01 2.47234e+00 72 2010 1 1.46607e+01 1.82567e+00 112 2010 2 1.09896e+01 1.36703e+00 242 2010 3 1.53267e+01 1.93974e+00 489 2010 4 2.14780e+01 1.63322e+00 626 2010 5 2.64627e+01 2.11404e+00 729 2010 6 3.02508e+01 1.52840e+00 694 2010 7 2.98415e+01 1.46762e+00 575 2010 8 2.94359e+01 1.50957e+00 373 2010 9 2.87901e+01 1.70091e+00 671 2010 10 2.39839e+01 1.51311e+00 890 2010 11 1.99456e+01 1.63471e+00 610 2010 12 1.42535e+01 2.63296e+00 308 2011 1 1.16129e+01 1.25496e+00 353 2011 2 1.48373e+01 3.23991e+00 278 2011 3 1.96358e+01 1.88667e+00 636 2011 4 2.33000e+01 1.84922e+00 843 2011 5 2.57775e+01 2.15594e+00 944 2011 6 2.94008e+01 1.84440e+00 676 2011 7 2.98684e+01 1.62178e+00 362 2011 8 3.04904e+01 9.69862e-01 740 2011 9 2.74801e+01 1.23065e+00 651 2011 10 2.32393e+01 2.04438e+00 583 2011 11 1.86583e+01 1.31858e+00 386 2011 12 1.61775e+01 1.16920e+00 227 2012 1 1.56578e+01 2.02009e+00 419 2012 2 1.57357e+01 1.84576e+00 122 2012 3 2.17939e+01 2.39196e+00 662 2012 4 2.32296e+01 1.50748e+00 850 2012 5 2.71865e+01 1.59759e+00 832 2012 6 2.72836e+01 1.58015e+00 623 2012 7 2.88902e+01 1.62561e+00 442 2012 8 2.88859e+01 1.68842e+00 480 2012 9 2.77941e+01 1.61180e+00 495 2012 10 2.48435e+01 1.76789e+00 594 2012 11 1.82300e+01 1.72037e+00 560 2012 12 1.74863e+01 1.23491e+00 271 2013 1 1.67151e+01 1.62569e+00 292 2013 2 1.60104e+01 1.68865e+00 311 2013 3 1.62524e+01 1.59469e+00 604 2013 4 2.07378e+01 2.14501e+00 534 2013 5 2.44552e+01 2.62019e+00 580 2013 6 2.81374e+01 1.58392e+00 545 2013 7 2.74834e+01 1.69317e+00 362 2013 8 2.87747e+01 1.87783e+00 437 2013 9 2.87936e+01 1.47221e+00 672 2013 10 2.43698e+01 2.33918e+00 578 2013 11 2.01151e+01 2.30848e+00 271 2013 12 1.70327e+01 2.05292e+00 331 2014 1 1.25765e+01 1.55150e+00 208 2014 2 1.46270e+01 1.86534e+00 227 2014 3 1.69910e+01 1.55210e+00 493 2014 4 1.99470e+01 1.51882e+00 493 2014 5 2.43636e+01 2.21564e+00 575 2014 6 2.84146e+01 1.93094e+00 584 2014 7 2.90260e+01 1.19972e+00 730 2014 8 2.97586e+01 1.56344e+00 726 2014 9 2.87525e+01 2.02349e+00 543 2014 10 2.48322e+01 1.94056e+00 865 2014 11 1.67993e+01 2.28334e+00 406 2014 12 1.59041e+01 1.25349e+00 344 2015 1 1.44807e+01 1.19488e+00 288 2015 2 1.36763e+01 1.43758e+00 451 2015 3 1.92549e+01 2.03607e+00 450 2015 4 2.26606e+01 2.13803e+00 272 2015 5 2.62060e+01 2.34705e+00 861 2015 6 2.93932e+01 1.80576e+00 525 2015 7 2.95482e+01 1.65918e+00 540 2015 8 2.98097e+01 1.39763e+00 562 2015 9 2.76475e+01 1.32645e+00 320 2015 10 2.41367e+01 1.60792e+00 518 2015 11 2.17658e+01 3.23730e+00 438 2015 12 1.74361e+01 1.62048e+00 226 2016 1 1.40568e+01 1.32157e+00 160 2016 2 1.46291e+01 1.81073e+00 351 2016 3 1.89532e+01 1.80003e+00 418 2016 4 2.15681e+01 1.60614e+00 615 2016 5 2.52132e+01 1.53226e+00 683 2016 6 2.93340e+01 1.57104e+00 596 2016 7 3.11127e+01 1.30369e+00 624 2016 8 3.01928e+01 1.65804e+00 574 2016 9 2.87637e+01 1.10022e+00 609 2016 10 2.51588e+01 1.74817e+00 792 2016 11 2.06428e+01 2.31511e+00 508 2016 12 1.73306e+01 1.39765e+00 329 2017 1 1.68284e+01 1.84971e+00 218 2017 2 1.80044e+01 1.85544e+00 528 2017 3 1.91761e+01 2.82646e+00 719 2017 4 2.29825e+01 1.79291e+00 689 2017 5 2.46354e+01 2.17857e+00 504 2017 6 2.77373e+01 2.00918e+00 346 2017 7 2.94832e+01 1.86313e+00 566 2017 8 2.94791e+01 1.64651e+00 537 2017 9 2.77023e+01 2.00225e+00 564 2017 10 2.49343e+01 2.21518e+00 641 2017 11 2.04435e+01 1.99492e+00 592 2017 12 1.69862e+01 2.51140e+00 252 2018 1 1.27911e+01 1.30533e+00 128 2018 2 1.93402e+01 2.86805e+00 328 2018 3 1.89299e+01 1.89495e+00 745 2018 4 2.15871e+01 1.65969e+00 692 2018 5 2.56746e+01 2.05754e+00 651 2018 6 2.89084e+01 1.74743e+00 436 2018 7 2.95563e+01 1.53273e+00 549 2018 8 2.90156e+01 1.59899e+00 488 2018 9 2.98017e+01 1.63731e+00 663 2018 10 2.66390e+01 2.47911e+00 713 2018 11 1.97927e+01 3.08706e+00 235 2018 12 1.52975e+01 1.50241e+00 240 2019 1 1.46266e+01 1.70729e+00 340 2019 2 1.74512e+01 1.84150e+00 157 2019 3 1.84911e+01 1.69091e+00 486 2019 4 2.21394e+01 1.99800e+00 522 2019 5 2.73550e+01 2.17532e+00 885 2019 6 2.88114e+01 2.05817e+00 500 2019 7 2.97111e+01 1.24462e+00 489 2019 8 3.01315e+01 1.16202e+00 524 2019 9 2.94385e+01 1.37795e+00 865 2019 10 2.67406e+01 2.29219e+00 606 2019 11 1.89851e+01 1.95108e+00 420 2019 12 1.66654e+01 1.68136e+00 243 2020 1 1.56780e+01 1.69242e+00 475 2020 2 1.55641e+01 1.50392e+00 369 2020 3 2.12588e+01 3.48531e+00 512 2020 4 2.30536e+01 1.22631e+00 408 2020 5 2.44175e+01 1.81509e+00 673 2020 6 2.85485e+01 1.67101e+00 517 2020 7 2.94826e+01 9.05005e-01 426 2020 8 3.07566e+01 1.05895e+00 343 2020 9 2.83033e+01 2.29114e+00 492 2020 10 2.50940e+01 1.43788e+00 580 2020 11 2.14349e+01 1.81186e+00 660 2020 12 1.53591e+01 1.73531e+00 596 2021 1 1.49111e+01 1.57527e+00 288 2021 2 1.50341e+01 2.01889e+00 382 2021 3 1.82898e+01 1.71058e+00 507 2021 4 2.11768e+01 1.89198e+00 634 2021 5 2.52966e+01 2.08300e+00 704 2021 6 2.79760e+01 1.64945e+00 350 2021 7 2.94364e+01 1.38795e+00 482 2021 8 2.94773e+01 1.65725e+00 456 2021 9 2.71224e+01 1.41268e+00 484 2021 10 2.54701e+01 1.76132e+00 489 2021 11 1.86004e+01 1.61787e+00 626 2021 12 1.77414e+01 1.82915e+00 425 2022 1 1.47764e+01 3.31296e+00 645 2022 2 1.56938e+01 3.13786e+00 451 2022 3 1.95484e+01 1.35445e+00 698 2022 4 2.24252e+01 1.27406e+00 435 2022 5 2.60741e+01 1.41374e+00 707 2022 6 2.98042e+01 1.90466e+00 563 2022 7 3.00548e+01 1.61631e+00 515 2022 8 3.03390e+01 1.66603e+00 447 2022 9 2.85892e+01 1.77800e+00 479 2022 10 2.33667e+01 2.09783e+00 745 2022 11 2.11055e+01 2.29689e+00 432 2022 12 1.70415e+01 3.46907e+00 554 2023 1 1.55835e+01 1.54557e+00 655 2023 2 1.79690e+01 2.28445e+00 601 2023 3 2.04436e+01 2.18664e+00 585 2023 4 2.24314e+01 1.24236e+00 547 2023 5 2.50739e+01 2.04686e+00 647 2023 6 2.80179e+01 1.96158e+00 578 2023 7 3.03551e+01 1.37975e+00 526 2023 8 3.10483e+01 1.27455e+00 647 2023 9 2.92367e+01 1.64040e+00 640 2023 10 2.35780e+01 1.61907e+00 740 2023 11 1.97383e+01 1.88869e+00 459 2023 12 1.42168e+01 1.33408e+00 356 2024 1 1.35462e+01 1.54858e+00 338 2024 2 1.53132e+01 1.49154e+00 481 2024 3 1.94145e+01 1.47896e+00 365 2024 4 2.04553e+01 1.33972e+00 32