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 nan nan 0 2002 8 nan nan 0 2002 9 2.26768e+00 2.37647e-01 170 2002 10 2.52252e+00 3.91118e-01 260 2002 11 2.44958e+00 2.61561e-01 470 2002 12 2.82606e+00 6.46144e-01 473 2003 1 2.39948e+00 2.82026e-01 682 2003 2 2.78580e+00 5.17990e-01 295 2003 3 2.29035e+00 3.66428e-01 145 2003 4 nan nan 0 2003 5 nan nan 0 2003 6 nan nan 0 2003 7 nan nan 0 2003 8 2.89705e+00 4.18721e-01 9 2003 9 3.81241e+00 9.56160e-01 45 2003 10 2.45563e+00 2.59792e-01 49 2003 11 2.59516e+00 2.62401e-01 345 2003 12 2.58963e+00 2.04262e-01 324 2004 1 2.76750e+00 3.17789e-01 171 2004 2 2.41489e+00 1.80190e-01 332 2004 3 2.85254e+00 1.35208e+00 253 2004 4 1.67381e+00 2.93679e-01 133 2004 5 nan nan 0 2004 6 1.83707e+00 1.90731e-01 24 2004 7 nan nan 0 2004 8 nan nan 0 2004 9 2.57965e+00 2.28721e-01 65 2004 10 2.77362e+00 3.55309e-01 162 2004 11 2.54211e+00 1.16234e-01 39 2004 12 2.53259e+00 3.68694e-01 468 2005 1 3.06042e+00 4.67885e-01 430 2005 2 3.26075e+00 9.31787e-01 581 2005 3 2.27350e+00 4.40071e-01 437 2005 4 1.99700e+00 5.26244e-02 6 2005 5 nan nan 0 2005 6 1.79462e+00 0.00000e+00 1 2005 7 nan nan 0 2005 8 nan nan 0 2005 9 nan nan 0 2005 10 3.33915e+00 4.36076e-01 280 2005 11 2.97280e+00 5.04505e-01 509 2005 12 2.70173e+00 2.93963e-01 860 2006 1 2.51372e+00 1.89757e-01 314 2006 2 2.28583e+00 2.11081e-01 135 2006 3 2.73108e+00 9.22989e-01 235 2006 4 1.66033e+00 2.39265e-01 150 2006 5 nan nan 0 2006 6 nan nan 0 2006 7 nan nan 0 2006 8 nan nan 0 2006 9 nan nan 0 2006 10 2.43400e+00 3.03602e-01 13 2006 11 3.29945e+00 1.07106e+00 795 2006 12 4.06653e+00 2.32069e+00 686 2007 1 2.72752e+00 2.80706e-01 664 2007 2 2.73599e+00 5.04075e-01 529 2007 3 2.41559e+00 5.32899e-01 250 2007 4 nan nan 0 2007 5 1.73491e+00 1.18718e-01 36 2007 6 nan nan 0 2007 7 nan nan 0 2007 8 2.62100e+00 1.82233e-01 41 2007 9 nan nan 0 2007 10 2.69781e+00 1.43316e-01 209 2007 11 2.68673e+00 2.40983e-01 424 2007 12 2.73560e+00 5.26080e-01 643 2008 1 2.26318e+00 1.62403e-01 281 2008 2 2.76599e+00 4.40501e-01 436 2008 3 2.08077e+00 1.82327e-01 260 2008 4 nan nan 0 2008 5 nan nan 0 2008 6 nan nan 0 2008 7 nan nan 0 2008 8 nan nan 0 2008 9 3.56913e+00 2.76975e-01 8 2008 10 3.50822e+00 1.11872e+00 166 2008 11 2.28495e+00 1.36535e-01 462 2008 12 2.18727e+00 3.14397e-01 912 2009 1 2.05017e+00 2.63671e-01 641 2009 2 2.04730e+00 3.49739e-01 342 2009 3 2.09107e+00 1.81660e-01 149 2009 4 nan nan 0 2009 5 1.81331e+00 1.67701e-01 20 2009 6 nan nan 0 2009 7 nan nan 0 2009 8 2.33659e+00 1.72407e-01 40 2009 9 2.69259e+00 3.83930e-01 224 2009 10 2.53303e+00 2.43321e-01 376 2009 11 2.57030e+00 3.35325e-01 579 2009 12 2.55779e+00 3.59048e-01 581 2010 1 2.67941e+00 2.02774e-01 529 2010 2 2.16545e+00 1.67168e-01 280 2010 3 1.75096e+00 1.92987e-01 167 2010 4 1.96384e+00 8.67517e-02 13 2010 5 1.91331e+00 2.02066e-01 36 2010 6 nan nan 0 2010 7 2.04854e+00 9.67479e-02 38 2010 8 nan nan 0 2010 9 2.36250e+00 1.76380e-01 178 2010 10 2.35574e+00 2.27583e-01 456 2010 11 2.27324e+00 2.22610e-01 806 2010 12 2.15229e+00 2.05297e-01 640 2011 1 1.90072e+00 2.17336e-01 653 2011 2 2.52057e+00 4.81492e-01 231 2011 3 2.05014e+00 4.32815e-01 260 2011 4 1.70394e+00 1.25011e-01 29 2011 5 nan nan 0 2011 6 nan nan 0 2011 7 nan nan 0 2011 8 1.96587e+00 1.22061e-01 57 2011 9 2.21235e+00 8.58005e-02 47 2011 10 2.42223e+00 2.06461e-01 87 2011 11 2.24145e+00 1.86732e-01 420 2011 12 2.07172e+00 2.60046e-01 1089 2012 1 2.03278e+00 2.27887e-01 763 2012 2 2.20088e+00 2.55813e-01 359 2012 3 2.01768e+00 2.81005e-01 476 2012 4 1.87022e+00 2.07564e-01 64 2012 5 1.66786e+00 7.22079e-02 15 2012 6 nan nan 0 2012 7 2.16923e+00 1.08565e-01 25 2012 8 2.10741e+00 1.88349e-01 7 2012 9 2.23771e+00 1.42226e-01 72 2012 10 2.28502e+00 2.24966e-01 368 2012 11 2.27803e+00 1.60140e-01 420 2012 12 2.36174e+00 1.36626e-01 382 2013 1 2.42364e+00 3.25393e-01 526 2013 2 2.18293e+00 5.15634e-01 479 2013 3 1.49194e+00 4.25660e-01 120 2013 4 nan nan 0 2013 5 nan nan 0 2013 6 1.88246e+00 6.25152e-02 25 2013 7 1.63241e+00 1.67481e-01 8 2013 8 nan nan 0 2013 9 2.34265e+00 2.85071e-01 90 2013 10 2.42341e+00 4.20821e-01 290 2013 11 2.13927e+00 2.27497e-01 435 2013 12 2.28648e+00 2.25701e-01 367 2014 1 2.32549e+00 2.58030e-01 500 2014 2 1.86778e+00 2.74571e-01 548 2014 3 1.80882e+00 2.67653e-01 341 2014 4 1.54382e+00 6.98310e-02 8 2014 5 nan nan 0 2014 6 1.67614e+00 1.23175e-01 21 2014 7 1.72047e+00 2.35492e-01 88 2014 8 2.08242e+00 1.18052e-01 99 2014 9 2.33703e+00 3.25829e-01 101 2014 10 2.29826e+00 1.55681e-01 464 2014 11 2.16523e+00 2.81407e-01 542 2014 12 2.14403e+00 2.61791e-01 991 2015 1 1.86177e+00 2.40843e-01 572 2015 2 2.04153e+00 1.85829e-01 199 2015 3 2.11811e+00 1.93105e-01 235 2015 4 1.65491e+00 1.86063e-01 45 2015 5 1.63329e+00 6.34924e-02 9 2015 6 nan nan 0 2015 7 1.76681e+00 0.00000e+00 1 2015 8 2.33311e+00 1.51959e-01 5 2015 9 2.48509e+00 1.50991e-01 53 2015 10 2.53241e+00 2.21392e-01 169 2015 11 2.32369e+00 2.70237e-01 548 2015 12 1.93151e+00 2.16266e-01 757 2016 1 2.40076e+00 4.16763e-01 745 2016 2 1.95980e+00 3.10256e-01 953 2016 3 1.97977e+00 2.12604e-01 239 2016 4 1.70825e+00 1.63290e-01 120 2016 5 1.79665e+00 8.75251e-02 32 2016 6 1.82452e+00 1.52112e-01 40 2016 7 nan nan 0 2016 8 1.77312e+00 2.60858e-01 9 2016 9 2.57088e+00 6.00968e-01 149 2016 10 2.59256e+00 6.16024e-01 531 2016 11 2.34656e+00 2.93363e-01 558 2016 12 2.17365e+00 2.60786e-01 443 2017 1 1.97071e+00 3.21321e-01 488 2017 2 2.22766e+00 2.76774e-01 506 2017 3 1.86205e+00 2.80024e-01 412 2017 4 1.22888e+00 1.64379e-01 132 2017 5 1.90661e+00 3.50135e-02 7 2017 6 1.87766e+00 2.37156e-01 20 2017 7 2.50509e+00 6.82564e-02 3 2017 8 2.48162e+00 1.13899e-01 70 2017 9 2.86523e+00 1.45488e-01 7 2017 10 2.36992e+00 4.45277e-01 378 2017 11 2.43902e+00 2.27665e-01 491 2017 12 2.15642e+00 2.21381e-01 558 2018 1 1.98288e+00 3.42083e-01 914 2018 2 2.25135e+00 1.44366e-01 229 2018 3 1.89548e+00 2.78786e-01 229 2018 4 nan nan 0 2018 5 nan nan 0 2018 6 2.05058e+00 8.15135e-02 3 2018 7 1.96459e+00 1.67121e-01 4 2018 8 1.92156e+00 2.42767e-01 112 2018 9 2.44243e+00 2.13887e-01 204 2018 10 2.65877e+00 8.80669e-02 32 2018 11 2.38271e+00 2.57330e-01 191 2018 12 2.33965e+00 2.03079e-01 496 2019 1 2.52395e+00 2.93875e-01 106 2019 2 2.20919e+00 3.26411e-01 432 2019 3 1.65398e+00 2.41741e-01 535 2019 4 2.24816e+00 7.32857e-01 129 2019 5 1.40940e+00 2.11677e-01 53 2019 6 1.75501e+00 2.84501e-01 70 2019 7 1.54732e+00 1.49137e-01 6 2019 8 1.82055e+00 1.69376e-01 24 2019 9 2.37624e+00 1.88505e-01 145 2019 10 2.33869e+00 1.67895e-01 385 2019 11 2.16997e+00 2.38222e-01 519 2019 12 2.24927e+00 2.25762e-01 458 2020 1 2.35228e+00 2.84864e-01 746 2020 2 2.11500e+00 2.70810e-01 550 2020 3 1.61511e+00 2.90208e-01 280 2020 4 1.41376e+00 1.92793e-01 79 2020 5 1.71866e+00 3.57007e-01 45 2020 6 2.00609e+00 8.19575e-02 44 2020 7 1.93365e+00 1.07704e-01 58 2020 8 3.69703e+00 8.05484e-01 83 2020 9 2.72931e+00 1.79300e-01 76 2020 10 2.56991e+00 2.72016e-01 668 2020 11 2.43811e+00 2.79382e-01 335 2020 12 2.44012e+00 2.40259e-01 565 2021 1 2.18878e+00 3.53361e-01 977 2021 2 2.13619e+00 2.22253e-01 438 2021 3 2.05574e+00 2.70480e-01 198 2021 4 1.86040e+00 2.05998e-01 37 2021 5 1.45952e+00 1.73718e-01 36 2021 6 2.23939e+00 0.00000e+00 2 2021 7 1.82920e+00 1.56167e-01 74 2021 8 2.31551e+00 1.85549e-01 174 2021 9 2.36603e+00 9.24218e-02 137 2021 10 2.27564e+00 2.87109e-01 429 2021 11 2.30749e+00 2.15920e-01 578 2021 12 2.32401e+00 3.56785e-01 560 2022 1 2.18800e+00 3.74091e-01 563 2022 2 1.80890e+00 3.78816e-01 769 2022 3 1.63141e+00 1.81768e-01 107 2022 4 nan nan 0 2022 5 1.81790e+00 5.54614e-02 23 2022 6 1.56866e+00 1.73670e-01 94 2022 7 1.72599e+00 2.02676e-01 75 2022 8 nan nan 0 2022 9 1.91135e+00 3.05879e-01 53 2022 10 2.37391e+00 1.73734e-01 372 2022 11 2.05860e+00 2.59830e-01 430 2022 12 1.90438e+00 3.51937e-01 679 2023 1 2.14394e+00 1.89659e-01 250 2023 2 2.15505e+00 2.98905e-01 437 2023 3 1.53826e+00 2.57705e-01 794 2023 4 1.49105e+00 1.99339e-01 293 2023 5 1.74974e+00 1.79982e-01 183 2023 6 1.73736e+00 1.56418e-01 347 2023 7 2.00568e+00 1.95330e-01 267 2023 8 2.06186e+00 2.06058e-01 161 2023 9 2.11665e+00 2.58500e-01 646 2023 10 2.35572e+00 2.05239e-01 421 2023 11 2.40635e+00 2.58997e-01 516 2023 12 2.33024e+00 3.19933e-01 768 2024 1 2.08791e+00 3.21071e-01 916 2024 2 1.64693e+00 2.22391e-01 954 2024 3 1.78919e+00 1.75350e-01 473 2024 4 1.58008e+00 1.45454e-01 128