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 2.44680e+00 3.39064e-01 288 2002 8 2.22434e+00 3.00987e-01 136 2002 9 3.16904e+00 9.81243e-01 422 2002 10 2.92886e+00 5.79283e-01 798 2002 11 2.45868e+00 3.28711e-01 346 2002 12 3.97130e+00 9.89712e-01 320 2003 1 3.88484e+00 1.85793e-01 64 2003 2 3.09267e+00 4.93963e-01 290 2003 3 2.44769e+00 2.82930e-01 246 2003 4 4.27257e+00 1.04714e+00 128 2003 5 2.30667e+00 9.00024e-02 4 2003 6 2.07035e+00 3.15761e-01 57 2003 7 1.60385e+00 2.51118e-02 5 2003 8 2.33280e+00 2.33048e-01 203 2003 9 2.32232e+00 2.58650e-01 192 2003 10 2.49087e+00 5.16612e-01 935 2003 11 4.39002e+00 1.17037e+00 622 2003 12 5.44629e+00 1.26290e+00 303 2004 1 4.02259e+00 1.27579e+00 692 2004 2 2.68770e+00 2.92608e-01 384 2004 3 4.07660e+00 4.23173e-01 128 2004 4 nan nan 0 2004 5 3.23754e+00 9.92776e-01 120 2004 6 2.29355e+00 2.96790e-01 124 2004 7 2.33886e+00 2.93038e-01 253 2004 8 2.43966e+00 2.87651e-01 392 2004 9 nan nan 0 2004 10 2.68349e+00 2.84499e-01 754 2004 11 2.52826e+00 3.46906e-01 837 2004 12 2.98273e+00 5.19674e-01 451 2005 1 4.39982e+00 9.38130e-01 894 2005 2 2.83015e+00 4.00142e-01 314 2005 3 2.89052e+00 6.24777e-01 121 2005 4 nan nan 0 2005 5 1.04979e+00 4.60145e-02 14 2005 6 3.36036e+00 7.79162e-01 302 2005 7 2.89961e+00 7.09924e-01 170 2005 8 4.24866e+00 8.66574e-01 289 2005 9 2.77648e+00 3.29674e-01 28 2005 10 3.23865e+00 2.62372e-01 23 2005 11 3.64861e+00 5.35089e-01 73 2005 12 3.72446e+00 4.72736e-01 320 2006 1 3.00247e+00 3.50206e-01 127 2006 2 2.77323e+00 1.86113e-01 129 2006 3 2.76155e+00 1.36284e-01 3 2006 4 nan nan 0 2006 5 nan nan 0 2006 6 2.26323e+00 1.91836e-01 120 2006 7 1.94612e+00 1.32321e-01 105 2006 8 2.19533e+00 2.85651e-01 166 2006 9 2.01099e+00 2.29063e-01 263 2006 10 2.14904e+00 1.99827e-01 716 2006 11 2.63354e+00 3.69699e-01 630 2006 12 4.00934e+00 7.60573e-01 397 2007 1 3.23748e+00 5.35449e-01 779 2007 2 2.61279e+00 4.41193e-01 373 2007 3 2.11358e+00 1.84575e-01 285 2007 4 2.28267e+00 1.70508e-01 154 2007 5 2.00610e+00 1.64429e-01 41 2007 6 3.37808e+00 7.77128e-01 434 2007 7 1.94935e+00 2.00192e-01 306 2007 8 2.45238e+00 3.48919e-01 440 2007 9 2.13223e+00 1.17224e-01 500 2007 10 3.10238e+00 7.43119e-01 705 2007 11 3.75804e+00 9.55877e-01 1088 2007 12 2.81794e+00 5.69169e-01 1099 2008 1 3.18238e+00 5.04276e-01 454 2008 2 2.47362e+00 2.33803e-01 494 2008 3 2.09942e+00 1.28235e-01 118 2008 4 2.23432e+00 2.69544e-01 131 2008 5 1.94442e+00 1.12821e-01 185 2008 6 2.75997e+00 3.91630e-01 254 2008 7 4.33463e+00 9.32013e-01 133 2008 8 3.65552e+00 3.24367e-01 192 2008 9 3.52157e+00 7.34174e-01 129 2008 10 3.13383e+00 8.56843e-01 293 2008 11 4.12718e+00 8.14460e-01 709 2008 12 3.99071e+00 5.79653e-01 839 2009 1 3.18224e+00 4.08880e-01 565 2009 2 2.42043e+00 1.17285e-01 322 2009 3 1.62672e+00 2.02827e-01 69 2009 4 2.25273e+00 2.93582e-01 256 2009 5 2.64231e+00 5.23632e-01 516 2009 6 2.27230e+00 2.62476e-01 196 2009 7 2.53572e+00 6.29904e-01 362 2009 8 2.69467e+00 1.97244e+00 105 2009 9 2.41428e+00 3.11704e-01 402 2009 10 2.41607e+00 2.11422e-01 785 2009 11 3.53063e+00 6.29087e-01 671 2009 12 3.34104e+00 2.74163e-01 514 2010 1 5.55267e+00 1.36120e+00 329 2010 2 2.97235e+00 2.45314e-01 129 2010 3 nan nan 0 2010 4 nan nan 0 2010 5 2.28983e+00 2.26614e-01 383 2010 6 2.19491e+00 2.30386e-01 218 2010 7 3.09668e+00 4.68221e-01 447 2010 8 3.60185e+00 4.18387e-01 374 2010 9 3.11579e+00 4.75336e-01 632 2010 10 4.20663e+00 8.81973e-01 809 2010 11 3.88418e+00 2.92832e-01 604 2010 12 2.94931e+00 6.28676e-01 310 2011 1 2.45454e+00 1.40609e-01 253 2011 2 1.95680e+00 5.19183e-02 23 2011 3 2.05353e+00 3.38103e-01 75 2011 4 1.94416e+00 2.85049e-01 512 2011 5 1.87943e+00 2.08338e-01 183 2011 6 2.26261e+00 2.17700e-01 149 2011 7 2.14086e+00 1.42562e-01 265 2011 8 2.03359e+00 1.17186e-01 69 2011 9 2.25039e+00 2.71326e-01 539 2011 10 2.76569e+00 5.94135e-01 356 2011 11 3.35259e+00 7.40039e-01 866 2011 12 4.58697e+00 7.00675e-01 1147 2012 1 3.96990e+00 4.83215e-01 909 2012 2 2.94162e+00 2.07229e-01 562 2012 3 3.03581e+00 3.79466e-01 648 2012 4 2.87492e+00 3.57406e-01 576 2012 5 2.78516e+00 3.92343e-01 254 2012 6 2.34105e+00 2.74540e-01 312 2012 7 2.18454e+00 8.10860e-02 128 2012 8 2.20678e+00 5.25734e-01 293 2012 9 2.52191e+00 3.19993e-01 370 2012 10 2.26703e+00 2.08081e-01 321 2012 11 3.58966e+00 5.77153e-01 828 2012 12 3.93009e+00 5.77296e-01 761 2013 1 2.70953e+00 1.76153e-01 772 2013 2 2.73940e+00 1.81215e-01 545 2013 3 2.42220e+00 1.25057e-01 192 2013 4 2.45439e+00 1.94511e-01 171 2013 5 2.40010e+00 2.25515e-01 335 2013 6 2.57424e+00 1.72846e-01 238 2013 7 2.48960e+00 1.88203e-01 134 2013 8 1.02713e+00 0.00000e+00 2 2013 9 2.17272e+00 8.86601e-02 256 2013 10 2.22175e+00 1.81364e-01 820 2013 11 3.81958e+00 1.67028e+00 772 2013 12 4.44192e+00 7.34443e-01 756 2014 1 4.27988e+00 6.01814e-01 1011 2014 2 3.19588e+00 4.14505e-01 803 2014 3 2.42856e+00 2.00204e-01 749 2014 4 2.43058e+00 2.28716e-01 520 2014 5 3.53516e+00 8.91297e-01 496 2014 6 3.41261e+00 8.92380e-01 379 2014 7 2.82190e+00 2.21230e-01 308 2014 8 2.88925e+00 4.69201e-01 705 2014 9 2.80364e+00 1.71410e-01 169 2014 10 2.78170e+00 3.51187e-01 1148 2014 11 3.91414e+00 6.86639e-01 822 2014 12 4.07954e+00 7.90372e-01 752 2015 1 3.56339e+00 4.16185e-01 739 2015 2 2.96222e+00 5.05021e-01 336 2015 3 2.83582e+00 6.98354e-01 416 2015 4 2.25902e+00 2.82684e-01 402 2015 5 2.64763e+00 2.80139e-01 324 2015 6 3.04410e+00 4.44089e-01 447 2015 7 2.81862e+00 4.02309e-01 306 2015 8 2.76459e+00 3.91391e-01 305 2015 9 2.74734e+00 3.88279e-01 426 2015 10 2.76934e+00 3.00278e-01 561 2015 11 3.27419e+00 6.47544e-01 959 2015 12 3.36182e+00 7.69908e-01 583 2016 1 3.07041e+00 5.04913e-01 146 2016 2 4.53304e+00 1.52179e+00 436 2016 3 2.98683e+00 3.11406e-01 265 2016 4 2.33393e+00 2.10049e-01 458 2016 5 2.40529e+00 2.34039e-01 410 2016 6 2.63850e+00 7.02882e-01 384 2016 7 2.37276e+00 2.32762e-01 401 2016 8 2.37328e+00 1.57077e-01 261 2016 9 2.31303e+00 2.95306e-01 578 2016 10 2.59759e+00 4.69297e-01 585 2016 11 4.65150e+00 9.83499e-01 1133 2016 12 4.41505e+00 6.32726e-01 745 2017 1 3.44496e+00 3.72564e-01 628 2017 2 2.67505e+00 3.00212e-01 683 2017 3 2.74362e+00 6.72806e-01 108 2017 4 1.87182e+00 2.36990e-01 62 2017 5 2.75588e+00 7.98783e-01 346 2017 6 2.60076e+00 1.40807e-01 170 2017 7 2.96590e+00 3.52666e-01 200 2017 8 2.63922e+00 1.40127e-01 384 2017 9 3.02755e+00 8.66542e-01 138 2017 10 4.00376e+00 4.95666e-01 217 2017 11 4.09145e+00 8.13942e-01 260 2017 12 3.38798e+00 3.45420e-01 440 2018 1 4.26400e+00 9.42293e-01 188 2018 2 3.87697e+00 1.12778e+00 425 2018 3 nan nan 0 2018 4 1.89797e+00 3.18360e-03 3 2018 5 nan nan 0 2018 6 1.96588e+00 1.37929e-01 105 2018 7 1.91843e+00 8.75684e-02 111 2018 8 2.99411e+00 1.68598e+00 85 2018 9 1.93179e+00 2.33551e-01 346 2018 10 2.13726e+00 2.43651e-01 670 2018 11 2.00855e+00 9.02104e-02 307 2018 12 3.02158e+00 4.72326e-01 569 2019 1 2.61487e+00 2.66894e-01 673 2019 2 2.34815e+00 2.72394e-01 690 2019 3 2.61726e+00 6.33948e-01 367 2019 4 3.37509e+00 9.30458e-01 169 2019 5 1.85547e+00 1.65377e-02 8 2019 6 2.11244e+00 1.17903e-01 222 2019 7 1.86504e+00 1.23970e-01 188 2019 8 1.92246e+00 8.61165e-02 121 2019 9 2.41328e+00 3.35296e-01 217 2019 10 3.01001e+00 4.75462e-01 616 2019 11 2.66971e+00 5.66456e-01 899 2019 12 2.16642e+00 3.33742e-01 504 2020 1 2.39929e+00 4.21828e-01 816 2020 2 2.75649e+00 5.33535e-01 622 2020 3 2.16885e+00 2.08660e-01 602 2020 4 1.84322e+00 2.50460e-01 237 2020 5 2.35393e+00 2.22821e-01 429 2020 6 2.49264e+00 3.16155e-01 467 2020 7 2.40323e+00 2.13041e-01 282 2020 8 2.46328e+00 6.12330e-01 640 2020 9 2.99537e+00 5.04138e-01 538 2020 10 2.98737e+00 2.27971e-01 396 2020 11 2.76726e+00 3.57365e-01 448 2020 12 3.98952e+00 8.98752e-01 972 2021 1 3.50026e+00 3.44496e-01 768 2021 2 2.93103e+00 2.73358e-01 750 2021 3 2.33648e+00 5.60390e-01 389 2021 4 2.26248e+00 2.10221e-01 125 2021 5 3.35020e+00 9.85329e-01 651 2021 6 3.10754e+00 1.16875e+00 257 2021 7 2.52780e+00 2.20232e-01 565 2021 8 2.90419e+00 8.70390e-01 372 2021 9 2.31229e+00 3.08708e-01 459 2021 10 2.26437e+00 2.29720e-01 795 2021 11 3.49580e+00 1.04430e+00 796 2021 12 3.57105e+00 4.95005e-01 1028 2022 1 2.52069e+00 2.04442e-01 568 2022 2 2.75418e+00 5.23822e-01 689 2022 3 2.50890e+00 3.58874e-01 411 2022 4 2.69709e+00 8.50007e-02 67 2022 5 2.49893e+00 3.20018e-01 515 2022 6 2.25513e+00 2.63875e-01 479 2022 7 2.46869e+00 2.81542e-01 320 2022 8 3.36929e+00 6.67791e-01 142 2022 9 2.66757e+00 3.61895e-01 245 2022 10 3.26202e+00 5.33849e-01 964 2022 11 3.99143e+00 6.05308e-01 1114 2022 12 3.80294e+00 6.59450e-01 793 2023 1 3.42334e+00 9.26870e-01 618 2023 2 2.34436e+00 2.49904e-01 926 2023 3 2.01889e+00 2.08067e-01 547 2023 4 2.34831e+00 4.30722e-01 269 2023 5 2.50003e+00 3.24435e-01 700 2023 6 1.95220e+00 1.58025e-01 119 2023 7 2.27315e+00 1.19260e-01 219 2023 8 2.67729e+00 1.43982e-01 128 2023 9 2.69216e+00 3.03138e-01 301 2023 10 2.36675e+00 4.16958e-01 585 2023 11 2.92360e+00 5.06571e-01 769 2023 12 3.55836e+00 6.58055e-01 226 2024 1 3.52854e+00 2.44341e-01 211 2024 2 3.15768e+00 3.84129e-01 292 2024 3 2.51118e+00 3.59608e-01 269 2024 4 2.30245e+00 1.36370e-02 64