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 1.24156e+01 2.13540e+00 782 2002 8 9.62789e+00 1.87174e+00 696 2002 9 8.92430e+00 1.79816e+00 722 2002 10 6.38199e+00 1.85576e+00 516 2002 11 5.12355e+00 5.00472e-01 843 2002 12 5.22526e+00 3.58951e-01 328 2003 1 5.43882e+00 8.78739e-01 724 2003 2 5.86596e+00 3.43888e-01 320 2003 3 6.82555e+00 6.29566e-01 512 2003 4 9.25113e+00 1.72134e+00 339 2003 5 7.43071e+00 1.72396e+00 224 2003 6 8.97268e+00 1.79200e+00 645 2003 7 1.14948e+01 1.00894e+00 356 2003 8 1.10746e+01 1.12291e+00 661 2003 9 7.21832e+00 2.15149e+00 962 2003 10 5.47001e+00 1.56364e+00 622 2003 11 5.20867e+00 6.98775e-01 832 2003 12 5.10053e+00 6.13665e-01 436 2004 1 4.49878e+00 1.40239e+00 480 2004 2 4.35663e+00 8.75886e-01 601 2004 3 7.63474e+00 8.63825e-01 695 2004 4 9.99570e+00 1.56999e+00 256 2004 5 1.06979e+01 1.82322e+00 320 2004 6 1.01967e+01 1.61715e+00 633 2004 7 1.05998e+01 2.58886e+00 578 2004 8 1.04859e+01 1.46870e+00 872 2004 9 7.33494e+00 2.28452e+00 531 2004 10 7.24895e+00 2.52475e+00 507 2004 11 3.16698e+00 9.79750e-01 423 2004 12 5.28876e+00 8.35706e-01 468 2005 1 4.67461e+00 1.00877e+00 651 2005 2 5.39109e+00 1.27011e+00 476 2005 3 9.59336e+00 1.74892e+00 611 2005 4 1.07124e+01 9.66509e-01 249 2005 5 1.02510e+01 7.18388e-01 198 2005 6 7.78947e+00 2.56078e+00 749 2005 7 1.32878e+01 2.73466e+00 192 2005 8 1.14873e+01 2.09722e+00 464 2005 9 8.45124e+00 1.60138e+00 722 2005 10 5.95830e+00 1.87146e+00 653 2005 11 5.13130e+00 6.19098e-01 514 2005 12 4.81969e+00 5.62687e-01 937 2006 1 4.90908e+00 7.14168e-01 456 2006 2 5.03035e+00 9.49493e-01 373 2006 3 7.22768e+00 1.43562e+00 813 2006 4 1.13298e+01 9.02919e-01 324 2006 5 6.22912e+00 1.52774e+00 437 2006 6 1.19215e+01 2.27547e+00 660 2006 7 9.62264e+00 1.79648e+00 410 2006 8 9.56137e+00 5.51559e-01 87 2006 9 9.44111e+00 1.58980e+00 959 2006 10 7.10635e+00 2.22105e+00 683 2006 11 4.25540e+00 6.14245e-01 636 2006 12 5.36587e+00 3.79377e-01 458 2007 1 5.01119e+00 4.28078e-01 700 2007 2 5.77385e+00 6.92242e-01 801 2007 3 6.80838e+00 6.55322e-01 618 2007 4 7.47424e+00 1.51227e+00 128 2007 5 5.98190e+00 1.79256e+00 179 2007 6 7.51628e+00 2.86178e+00 576 2007 7 8.28958e+00 1.35954e+00 94 2007 8 1.17060e+01 2.62799e+00 378 2007 9 7.42092e+00 2.17778e+00 905 2007 10 6.16255e+00 2.18353e+00 591 2007 11 4.11002e+00 9.12066e-01 921 2007 12 4.76443e+00 7.77901e-01 536 2008 1 6.00760e+00 6.90129e-01 128 2008 2 5.84611e+00 1.07336e+00 518 2008 3 7.69834e+00 1.43739e+00 687 2008 4 7.16301e+00 8.06825e-01 22 2008 5 4.22876e+00 2.25522e+00 108 2008 6 1.16398e+01 2.56171e+00 124 2008 7 7.78506e+00 2.64575e+00 137 2008 8 8.90927e+00 7.46621e-01 82 2008 9 7.61738e+00 2.76262e+00 373 2008 10 4.18282e+00 1.69278e+00 450 2008 11 4.19836e+00 5.01890e-01 690 2008 12 5.04594e+00 5.85659e-01 904 2009 1 4.99507e+00 1.07200e+00 799 2009 2 5.49579e+00 1.00570e+00 384 2009 3 6.74656e+00 5.31902e-01 256 2009 4 9.40060e+00 1.89111e-01 14 2009 5 8.66435e+00 2.71171e+00 333 2009 6 1.10656e+01 2.82155e+00 267 2009 7 1.00060e+01 2.43514e+00 128 2009 8 1.09204e+01 4.93992e-01 232 2009 9 9.14000e+00 1.43019e+00 458 2009 10 4.60253e+00 1.59473e+00 363 2009 11 5.88183e+00 2.12011e+00 366 2009 12 5.20955e+00 5.23697e-01 494 2010 1 5.60917e+00 5.56693e-01 563 2010 2 6.66595e+00 5.90452e-01 512 2010 3 9.94082e+00 1.00423e+00 372 2010 4 9.14164e+00 7.55847e-01 199 2010 5 7.62588e+00 6.33601e-01 320 2010 6 1.04332e+01 1.74325e+00 128 2010 7 1.15095e+01 1.13317e+00 644 2010 8 1.34264e+01 8.48134e-01 140 2010 9 8.69694e+00 1.66533e+00 449 2010 10 4.61395e+00 1.56837e+00 772 2010 11 4.65802e+00 5.55071e-01 1174 2010 12 4.32734e+00 9.47568e-01 854 2011 1 4.84507e+00 7.75622e-01 448 2011 2 5.38963e+00 7.86198e-01 367 2011 3 6.85981e+00 1.26456e+00 660 2011 4 7.05117e+00 4.13409e-01 127 2011 5 1.15006e+01 1.67126e+00 320 2011 6 1.15083e+01 1.01933e+00 276 2011 7 1.27895e+01 1.59503e+00 266 2011 8 1.21920e+01 8.66668e-01 528 2011 9 9.88603e+00 1.19538e+00 650 2011 10 5.97451e+00 1.66837e+00 861 2011 11 4.92783e+00 4.59894e-01 626 2011 12 5.12607e+00 6.08187e-01 1088 2012 1 6.07352e+00 4.34096e-01 769 2012 2 6.22365e+00 8.18951e-01 640 2012 3 6.71456e+00 4.32950e-01 484 2012 4 1.04401e+01 2.43626e+00 193 2012 5 nan nan 0 2012 6 1.26092e+01 1.25546e+00 322 2012 7 1.09416e+01 2.67693e+00 315 2012 8 1.23904e+01 1.13419e+00 258 2012 9 9.98435e+00 1.00522e+00 537 2012 10 8.71273e+00 1.36773e+00 402 2012 11 6.06059e+00 1.30780e+00 517 2012 12 5.58488e+00 3.38722e-01 359 2013 1 4.79870e+00 8.99643e-01 534 2013 2 4.79088e+00 7.47470e-01 698 2013 3 7.38647e+00 2.05861e+00 515 2013 4 1.08015e+01 1.45518e+00 256 2013 5 1.16715e+01 8.12216e-01 384 2013 6 1.34411e+01 1.79240e+00 453 2013 7 1.26200e+01 1.89068e+00 472 2013 8 1.17871e+01 1.58689e+00 594 2013 9 9.58599e+00 2.08722e+00 761 2013 10 5.54185e+00 1.53421e+00 972 2013 11 5.29724e+00 3.75600e-01 541 2013 12 5.37972e+00 4.81674e-01 863 2014 1 6.55319e+00 8.10737e-01 545 2014 2 7.18723e+00 1.17445e+00 644 2014 3 1.06755e+01 1.00236e+00 629 2014 4 8.42447e+00 2.41093e+00 333 2014 5 9.73953e+00 2.07659e+00 353 2014 6 9.94507e+00 1.16272e+00 834 2014 7 8.78804e+00 2.53062e+00 837 2014 8 1.08656e+01 1.61673e+00 451 2014 9 1.01611e+01 1.84753e+00 1203 2014 10 6.71269e+00 1.66996e+00 941 2014 11 4.90760e+00 6.29636e-01 733 2014 12 6.01078e+00 5.93694e-01 963 2015 1 5.73588e+00 6.82244e-01 735 2015 2 7.20474e+00 8.70975e-01 478 2015 3 8.56366e+00 9.37232e-01 566 2015 4 1.00038e+01 1.09381e+00 195 2015 5 1.02246e+01 3.33209e+00 150 2015 6 9.86467e+00 3.48666e+00 641 2015 7 9.29867e+00 2.09691e+00 314 2015 8 1.24525e+01 1.07163e+00 597 2015 9 6.86742e+00 2.64733e+00 604 2015 10 4.76599e+00 1.25961e+00 445 2015 11 4.98327e+00 7.78005e-01 621 2015 12 5.01893e+00 2.93260e-01 640 2016 1 5.30526e+00 3.11056e-01 759 2016 2 7.12066e+00 7.77565e-01 1091 2016 3 7.84702e+00 1.18197e+00 446 2016 4 9.16159e+00 2.08807e+00 554 2016 5 9.26147e+00 2.10569e+00 545 2016 6 1.20994e+01 3.63762e+00 393 2016 7 1.05597e+01 1.96847e+00 448 2016 8 1.26449e+01 1.16976e+00 481 2016 9 7.84230e+00 2.48578e+00 644 2016 10 4.66414e+00 1.69239e+00 568 2016 11 3.84777e+00 9.32029e-01 565 2016 12 5.06614e+00 4.14876e-01 640 2017 1 5.59369e+00 8.75448e-01 608 2017 2 6.57404e+00 9.41809e-01 447 2017 3 8.40069e+00 1.63291e+00 427 2017 4 1.01277e+01 4.77238e-01 192 2017 5 1.18749e+01 1.29931e+00 165 2017 6 1.26785e+01 1.07204e+00 946 2017 7 1.10033e+01 1.84189e+00 508 2017 8 1.18485e+01 3.01207e+00 517 2017 9 7.23688e+00 1.88120e+00 521 2017 10 4.57241e+00 1.83893e+00 510 2017 11 5.02983e+00 6.69039e-01 704 2017 12 5.21257e+00 4.72190e-01 853 2018 1 5.69795e+00 7.31521e-01 727 2018 2 5.77151e+00 4.48717e-01 325 2018 3 7.17882e+00 9.89970e-01 716 2018 4 6.43012e+00 1.28476e+00 270 2018 5 1.10649e+01 1.19772e+00 320 2018 6 8.48544e+00 1.99432e+00 607 2018 7 1.07098e+01 2.41189e+00 500 2018 8 9.53389e+00 1.66088e+00 829 2018 9 8.41565e+00 1.51055e+00 689 2018 10 7.00447e+00 3.54930e+00 200 2018 11 5.10240e+00 7.31446e-01 347 2018 12 4.79178e+00 7.03089e-01 655 2019 1 5.02919e+00 3.40186e-01 384 2019 2 5.24180e+00 5.59409e-01 642 2019 3 6.29376e+00 6.86376e-01 832 2019 4 7.15736e+00 1.76274e+00 563 2019 5 7.29407e+00 1.65182e+00 624 2019 6 1.03002e+01 2.72439e+00 733 2019 7 9.29132e+00 1.48515e+00 864 2019 8 8.75795e+00 2.61681e+00 871 2019 9 7.53632e+00 1.36758e+00 1024 2019 10 6.91006e+00 1.13520e+00 595 2019 11 5.18842e+00 3.05245e-01 447 2019 12 4.71500e+00 4.66914e-01 435 2020 1 5.56137e+00 4.56792e-01 522 2020 2 5.10389e+00 7.91094e-01 673 2020 3 6.58223e+00 8.84011e-01 534 2020 4 8.18864e+00 2.80454e+00 280 2020 5 1.07779e+01 2.46425e+00 448 2020 6 9.99089e+00 1.59190e+00 917 2020 7 1.03329e+01 1.94008e+00 726 2020 8 8.94310e+00 1.25969e+00 403 2020 9 7.62934e+00 2.12817e+00 968 2020 10 4.80423e+00 1.64236e+00 1404 2020 11 4.69702e+00 5.14903e-01 460 2020 12 4.29413e+00 5.25998e-01 397 2021 1 4.82836e+00 4.29099e-01 815 2021 2 6.08872e+00 4.49804e-01 783 2021 3 7.13781e+00 9.75764e-01 454 2021 4 9.03098e+00 9.46128e-01 310 2021 5 1.10231e+01 2.01908e+00 513 2021 6 1.11361e+01 1.79538e+00 661 2021 7 1.02431e+01 1.33367e+00 878 2021 8 1.06759e+01 9.79821e-01 640 2021 9 6.20486e+00 1.60898e+00 741 2021 10 5.21954e+00 1.58357e+00 969 2021 11 4.08402e+00 8.08547e-01 637 2021 12 4.77554e+00 4.86898e-01 325 2022 1 5.23010e+00 4.90731e-01 640 2022 2 6.62982e+00 9.69650e-01 900 2022 3 7.46898e+00 1.27234e+00 271 2022 4 7.38219e+00 2.85753e-01 62 2022 5 9.83194e+00 2.50347e+00 297 2022 6 1.32302e+01 1.42850e+00 431 2022 7 1.17233e+01 2.42478e+00 384 2022 8 1.05798e+01 1.08919e+00 574 2022 9 7.67155e+00 2.33187e+00 926 2022 10 6.63825e+00 9.35844e-01 744 2022 11 5.29061e+00 5.62221e-01 414 2022 12 5.40336e+00 6.62880e-01 535 2023 1 6.42266e+00 4.28327e-01 208 2023 2 6.20471e+00 1.07359e+00 570 2023 3 8.86518e+00 8.25863e-01 949 2023 4 8.89403e+00 1.79920e+00 866 2023 5 8.13737e+00 7.41625e-01 382 2023 6 1.01661e+01 1.26752e+00 1017 2023 7 9.73446e+00 2.07232e+00 704 2023 8 9.32081e+00 8.05022e-01 442 2023 9 7.39075e+00 9.44054e-01 1024 2023 10 7.37306e+00 1.21034e+00 825 2023 11 4.26840e+00 5.97316e-01 482 2023 12 5.32581e+00 5.61930e-01 528 2024 1 5.84980e+00 6.91650e-01 849 2024 2 7.01359e+00 6.94785e-01 960 2024 3 7.87578e+00 7.19638e-01 681 2024 4 1.00585e+01 6.69065e-01 128