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 2.82586e+01 4.46969e+00 199 2002 8 2.48027e+01 3.51732e+00 252 2002 9 2.19234e+01 8.96206e+00 252 2002 10 1.43232e+01 5.52681e+00 585 2002 11 1.92924e+01 4.54088e+00 1160 2002 12 2.04031e+01 4.47489e+00 788 2003 1 2.81238e+01 5.36354e+00 766 2003 2 2.36387e+01 3.78319e+00 636 2003 3 2.80320e+01 4.47545e+00 677 2003 4 2.45291e+01 4.45447e+00 128 2003 5 2.69785e+01 4.70373e+00 293 2003 6 1.80762e+01 2.27882e+00 64 2003 7 2.64835e+01 3.65849e+00 64 2003 8 2.45624e+01 4.39141e+00 135 2003 9 2.60715e+01 6.80263e+00 285 2003 10 2.50333e+01 4.81187e+00 509 2003 11 1.25707e+01 9.49456e+00 478 2003 12 2.02919e+01 6.37550e+00 717 2004 1 2.11476e+01 4.61469e+00 812 2004 2 2.34469e+01 6.58309e+00 814 2004 3 2.74612e+01 5.67249e+00 552 2004 4 2.74929e+01 5.56123e+00 525 2004 5 2.29095e+01 3.90735e+00 60 2004 6 2.65475e+01 6.80307e+00 247 2004 7 2.27732e+01 5.42124e+00 262 2004 8 2.48990e+01 5.45141e+00 316 2004 9 1.30119e+01 6.89249e+00 146 2004 10 2.36741e+01 6.08912e+00 184 2004 11 1.98958e+01 4.48023e+00 682 2004 12 2.61449e+01 4.95736e+00 769 2005 1 2.62596e+01 5.31929e+00 786 2005 2 2.86188e+01 4.96207e+00 593 2005 3 2.74167e+01 5.24635e+00 734 2005 4 2.62737e+01 5.97770e+00 504 2005 5 2.36359e+01 9.16875e+00 224 2005 6 nan nan 0 2005 7 2.50348e+01 4.47703e+00 128 2005 8 2.74941e+01 4.64118e+00 70 2005 9 2.57773e+01 4.71803e+00 140 2005 10 1.69203e+01 1.08849e+01 176 2005 11 2.17363e+01 5.57476e+00 307 2005 12 2.13598e+01 6.79616e+00 1018 2006 1 2.18269e+01 7.95122e+00 481 2006 2 2.82302e+01 4.57505e+00 808 2006 3 2.72715e+01 4.03230e+00 693 2006 4 2.51808e+01 4.97160e+00 378 2006 5 2.86871e+01 5.40506e+00 255 2006 6 2.58138e+01 8.89620e+00 132 2006 7 2.21311e+01 5.30883e+00 248 2006 8 1.34245e+01 3.09140e-01 2 2006 9 2.77386e+01 4.55947e+00 313 2006 10 2.52763e+01 4.48702e+00 261 2006 11 2.33125e+01 4.99361e+00 708 2006 12 1.90615e+01 5.04182e+00 1007 2007 1 2.48243e+01 4.30913e+00 992 2007 2 2.59186e+01 5.36318e+00 656 2007 3 2.70631e+01 4.50576e+00 425 2007 4 2.67382e+01 5.37428e+00 327 2007 5 2.98646e+01 4.40979e+00 128 2007 6 2.74589e+01 2.20808e+00 62 2007 7 2.91787e+01 4.40800e+00 189 2007 8 2.19540e+01 1.20650e+01 248 2007 9 1.48880e+01 4.49005e+00 192 2007 10 2.21039e+01 6.05029e+00 249 2007 11 2.38606e+01 7.06538e+00 524 2007 12 1.48619e+01 9.48821e+00 724 2008 1 2.16901e+01 6.59207e+00 1028 2008 2 2.60859e+01 5.36404e+00 776 2008 3 2.80360e+01 4.09892e+00 437 2008 4 3.13131e+01 5.66317e+00 249 2008 5 2.69664e+01 4.37119e+00 449 2008 6 2.52872e+01 3.36282e+00 64 2008 7 2.34044e+01 3.57030e+00 193 2008 8 2.76437e+01 7.94370e+00 256 2008 9 2.04227e+01 7.52468e+00 252 2008 10 2.17139e+01 6.19304e+00 469 2008 11 2.17338e+01 7.31503e+00 704 2008 12 2.36401e+01 6.23386e+00 879 2009 1 2.32244e+01 6.97286e+00 1183 2009 2 2.38822e+01 6.34018e+00 676 2009 3 2.90301e+01 4.46800e+00 428 2009 4 2.17744e+01 8.27091e+00 554 2009 5 1.84575e+01 3.16664e+00 150 2009 6 2.09331e+01 5.54792e+00 128 2009 7 2.69176e+01 4.57849e+00 359 2009 8 2.76621e+01 4.14512e+00 244 2009 9 2.38288e+01 5.39343e+00 236 2009 10 2.40784e+01 4.47623e+00 539 2009 11 2.09463e+01 5.06821e+00 883 2009 12 1.78271e+01 4.78338e+00 749 2010 1 2.24740e+01 6.01243e+00 754 2010 2 2.85699e+01 4.74625e+00 872 2010 3 2.60738e+01 3.96446e+00 441 2010 4 2.91286e+01 7.13983e+00 234 2010 5 2.67829e+01 4.77804e+00 238 2010 6 2.34840e+01 5.19105e+00 371 2010 7 2.69130e+01 6.44580e+00 116 2010 8 1.85832e+01 3.56943e+00 308 2010 9 2.36301e+01 4.34307e+00 212 2010 10 1.65847e+01 8.66389e+00 345 2010 11 1.84923e+01 7.30570e+00 416 2010 12 2.12623e+01 4.23939e+00 660 2011 1 2.65559e+01 4.76115e+00 744 2011 2 2.29100e+01 5.55469e+00 760 2011 3 2.47701e+01 6.45960e+00 728 2011 4 2.70678e+01 5.37180e+00 510 2011 5 2.86090e+01 4.53088e+00 253 2011 6 2.60650e+01 4.76680e+00 64 2011 7 3.21148e+01 6.58423e+00 147 2011 8 1.75717e+01 6.21341e+00 193 2011 9 1.37089e+01 2.07201e+00 256 2011 10 1.95707e+01 3.44642e+00 385 2011 11 2.06099e+01 4.88576e+00 629 2011 12 2.17530e+01 4.13276e+00 828 2012 1 2.67846e+01 5.46200e+00 828 2012 2 2.75530e+01 4.65266e+00 766 2012 3 3.00434e+01 5.74718e+00 505 2012 4 2.94741e+01 5.38196e+00 470 2012 5 2.87532e+01 4.89744e+00 190 2012 6 2.49866e+01 3.88361e+00 96 2012 7 2.85905e+01 4.15286e+00 248 2012 8 7.62150e+00 8.72025e+00 67 2012 9 2.52536e+01 6.41263e+00 392 2012 10 2.30768e+01 3.43714e+00 194 2012 11 2.75289e+01 5.61659e+00 919 2012 12 2.24240e+01 4.50357e+00 713 2013 1 2.24002e+01 8.26136e+00 667 2013 2 2.84499e+01 4.39103e+00 859 2013 3 2.64212e+01 5.30499e+00 525 2013 4 2.40768e+01 3.92712e+00 370 2013 5 2.69832e+01 5.12633e+00 267 2013 6 nan nan 0 2013 7 1.93592e+01 6.98329e+00 495 2013 8 2.20777e+01 2.58731e+00 190 2013 9 1.88043e+01 3.02584e+00 192 2013 10 2.88497e+01 4.44354e+00 304 2013 11 2.10225e+01 4.04828e+00 826 2013 12 1.34514e+01 5.21074e+00 822 2014 1 2.13632e+01 5.95181e+00 1088 2014 2 2.76408e+01 4.15326e+00 933 2014 3 2.73912e+01 5.87266e+00 595 2014 4 2.93039e+01 5.90216e+00 171 2014 5 2.69098e+01 4.16702e+00 192 2014 6 2.42266e+01 3.36679e+00 192 2014 7 3.25539e+01 6.92878e+00 211 2014 8 2.37263e+01 4.68904e+00 64 2014 9 2.79038e+01 6.36850e+00 274 2014 10 2.64790e+01 5.50847e+00 729 2014 11 1.57130e+01 9.00620e+00 933 2014 12 2.65508e+01 6.03271e+00 1205 2015 1 2.33197e+01 4.70458e+00 761 2015 2 2.45291e+01 4.47587e+00 837 2015 3 2.69799e+01 6.41765e+00 614 2015 4 2.95677e+01 4.22558e+00 459 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 2.16292e+01 3.66617e+00 111 2015 8 2.71238e+01 4.24688e+00 434 2015 9 2.69045e+01 5.89899e+00 429 2015 10 2.60629e+01 4.33801e+00 392 2015 11 2.38907e+01 5.39961e+00 509 2015 12 2.32566e+01 5.73776e+00 1038 2016 1 2.40377e+01 4.49938e+00 869 2016 2 2.48440e+01 4.54944e+00 856 2016 3 2.69693e+01 4.07609e+00 368 2016 4 2.69796e+01 4.78513e+00 256 2016 5 2.38394e+01 3.98731e+00 180 2016 6 2.89573e+01 3.68718e+00 189 2016 7 2.76016e+01 3.53423e+00 222 2016 8 2.46875e+01 6.19876e+00 184 2016 9 2.69326e+01 5.13184e+00 452 2016 10 2.24092e+01 5.41259e+00 311 2016 11 2.03690e+01 4.77372e+00 194 2016 12 1.93776e+01 7.11244e+00 1119 2017 1 2.52251e+01 5.68862e+00 690 2017 2 2.67134e+01 5.84788e+00 796 2017 3 2.84591e+01 7.40290e+00 447 2017 4 2.82348e+01 5.10251e+00 384 2017 5 2.64413e+01 5.49712e+00 497 2017 6 2.59550e+01 6.20752e+00 317 2017 7 2.11386e+01 9.27273e+00 312 2017 8 1.55811e+01 3.62894e+00 97 2017 9 2.19854e+01 6.48008e+00 192 2017 10 1.78479e+00 9.25355e-01 91 2017 11 2.61100e+01 7.37493e+00 601 2017 12 1.91875e+01 5.90132e+00 1099 2018 1 2.56753e+01 6.33697e+00 725 2018 2 2.02070e+01 7.69038e+00 425 2018 3 2.73599e+01 4.23032e+00 441 2018 4 2.72193e+01 3.96118e+00 316 2018 5 2.79455e+01 4.30814e+00 427 2018 6 2.46900e+01 4.77124e+00 320 2018 7 2.52550e+01 3.96818e+00 128 2018 8 3.07645e+01 6.89242e+00 339 2018 9 2.31429e+01 4.88622e+00 301 2018 10 2.06857e+01 7.38409e+00 517 2018 11 1.25008e+01 5.54177e+00 884 2018 12 1.52193e+01 5.22355e+00 940 2019 1 2.24402e+01 7.40376e+00 816 2019 2 2.73251e+01 4.31745e+00 513 2019 3 2.94604e+01 5.08449e+00 641 2019 4 2.99650e+01 5.13632e+00 539 2019 5 3.08764e+01 4.17350e+00 158 2019 6 2.69580e+01 4.13304e+00 200 2019 7 2.41753e+01 4.29230e+00 310 2019 8 2.74230e+01 4.55750e+00 111 2019 9 2.31037e+01 8.85381e+00 187 2019 10 2.66162e+01 6.55831e+00 298 2019 11 1.81627e+01 4.16315e+00 1033 2019 12 2.07415e+01 5.42179e+00 703 2020 1 2.29360e+01 6.51970e+00 891 2020 2 2.64314e+01 5.61546e+00 802 2020 3 2.56499e+01 6.08363e+00 467 2020 4 3.07977e+01 5.83409e+00 831 2020 5 2.89537e+01 4.99767e+00 340 2020 6 2.98612e+01 5.26435e+00 441 2020 7 2.91678e+01 4.89746e+00 256 2020 8 1.08407e+01 4.47445e+00 199 2020 9 2.81361e+01 5.25866e+00 215 2020 10 2.57875e+01 3.90434e+00 366 2020 11 1.85816e+01 7.83184e+00 634 2020 12 1.92246e+01 4.74109e+00 810 2021 1 2.54946e+01 5.50852e+00 762 2021 2 2.66099e+01 7.37926e+00 697 2021 3 2.92052e+01 5.04973e+00 720 2021 4 2.94959e+01 4.94879e+00 498 2021 5 2.65779e+01 4.05710e+00 416 2021 6 1.69010e+01 2.24784e+00 65 2021 7 1.07778e+01 8.51498e+00 205 2021 8 2.48305e+01 4.54169e+00 272 2021 9 2.65426e+01 4.03585e+00 142 2021 10 1.77347e+01 4.12947e+00 214 2021 11 1.62665e+01 5.92305e+00 991 2021 12 2.09917e+01 5.63525e+00 937 2022 1 2.94613e+01 5.46419e+00 1130 2022 2 3.14762e+01 4.43431e+00 512 2022 3 3.13735e+01 6.55077e+00 588 2022 4 3.45652e+01 5.72306e+00 126 2022 5 3.11330e+01 5.66248e+00 349 2022 6 3.42494e+01 7.65368e+00 359 2022 7 2.63988e+01 7.77702e+00 125 2022 8 2.91739e+01 6.08294e+00 256 2022 9 5.26900e-01 2.85803e-01 42 2022 10 1.38137e+01 6.51860e+00 347 2022 11 1.99645e+01 6.30216e+00 867 2022 12 2.28387e+01 6.80602e+00 1077 2023 1 2.63221e+01 5.11990e+00 1106 2023 2 2.81766e+01 9.45870e+00 797 2023 3 2.88341e+01 9.09250e+00 633 2023 4 3.17538e+01 6.10539e+00 561 2023 5 2.72001e+01 5.99951e+00 350 2023 6 2.72493e+01 5.16027e+00 158 2023 7 2.36353e+01 3.23708e+00 51 2023 8 2.53300e+01 5.38118e+00 195 2023 9 2.67451e+01 7.53018e+00 454 2023 10 2.97107e+01 8.01536e+00 224 2023 11 2.57921e+01 7.27433e+00 721 2023 12 2.02891e+01 7.25538e+00 949 2024 1 2.12317e+01 6.46709e+00 911 2024 2 2.87592e+01 8.63662e+00 670 2024 3 2.89728e+01 7.44398e+00 571 2024 4 3.65182e+01 3.31558e+00 70