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 2.16948e+01 1.25142e+00 48 2002 8 2.08248e+01 3.78818e+00 52 2002 9 1.88133e+01 3.24375e+00 121 2002 10 1.46663e+01 6.25943e+00 277 2002 11 1.46797e+01 3.60494e+00 268 2002 12 1.45938e+01 3.28232e+00 421 2003 1 1.23854e+01 5.33848e+00 521 2003 2 1.16360e+01 2.09516e+00 133 2003 3 2.56871e+01 5.83452e+00 162 2003 4 1.50603e+01 3.45304e+00 101 2003 5 1.67578e+01 5.35258e+00 34 2003 6 nan nan 0 2003 7 nan nan 0 2003 8 2.28771e+01 2.85699e+00 132 2003 9 2.05372e+01 5.91389e+00 148 2003 10 1.57065e+01 5.97167e+00 169 2003 11 6.87486e+00 2.18653e+00 211 2003 12 1.17510e+01 3.01519e+00 378 2004 1 9.78671e+00 3.18864e+00 654 2004 2 1.09522e+01 4.91412e+00 510 2004 3 1.58638e+01 4.10940e+00 203 2004 4 1.96195e+01 2.95267e+00 302 2004 5 2.23403e+01 4.49577e+00 100 2004 6 2.93288e+01 5.18863e+00 85 2004 7 1.68274e+01 9.99889e-01 64 2004 8 2.41015e+01 1.53848e+00 22 2004 9 1.42750e+01 6.57550e-01 55 2004 10 1.48623e+01 5.18649e+00 301 2004 11 1.21182e+01 1.50743e+00 268 2004 12 1.23433e+01 3.75767e+00 573 2005 1 8.96713e+00 4.72228e+00 382 2005 2 6.67721e+00 4.86506e+00 525 2005 3 2.30386e+01 3.77349e+00 371 2005 4 2.22972e+01 2.38065e+00 45 2005 5 2.62717e+01 6.36660e+00 61 2005 6 2.01447e+01 1.73922e+00 68 2005 7 2.35351e+01 3.10883e+00 121 2005 8 2.33982e+01 2.33077e+00 43 2005 9 1.87492e+01 4.62020e+00 132 2005 10 9.60216e+00 4.68396e+00 36 2005 11 1.39552e+01 3.76441e+00 680 2005 12 1.17971e+01 2.94447e+00 531 2006 1 7.42071e+00 5.09374e+00 528 2006 2 1.48724e+01 4.76101e+00 418 2006 3 9.26591e+00 3.50676e+00 277 2006 4 1.95126e+01 1.68824e+00 178 2006 5 1.89638e+01 2.03592e+00 130 2006 6 nan nan 0 2006 7 2.00692e+01 8.37817e+00 201 2006 8 1.63741e+01 1.86634e+00 128 2006 9 1.81060e+01 4.25727e+00 243 2006 10 1.36778e+01 2.71303e+00 172 2006 11 1.30427e+01 2.86074e+00 356 2006 12 1.14488e+01 4.10381e+00 596 2007 1 6.51135e+00 2.85057e+00 629 2007 2 9.16470e+00 6.03416e+00 441 2007 3 1.05759e+01 2.97449e+00 42 2007 4 1.45642e+01 4.22906e+00 206 2007 5 1.94340e+01 3.68101e+00 64 2007 6 nan nan 0 2007 7 1.94169e+01 4.12941e+00 48 2007 8 2.18666e+01 5.91353e+00 77 2007 9 1.48901e+01 2.08792e+00 121 2007 10 1.77396e+01 1.79151e+00 83 2007 11 1.26036e+01 9.34012e+00 383 2007 12 1.09184e+01 3.73011e+00 483 2008 1 1.13156e+01 3.27770e+00 609 2008 2 9.12816e+00 7.97296e+00 403 2008 3 1.05524e+01 4.99073e+00 445 2008 4 1.56308e+01 1.12690e+01 14 2008 5 2.36227e+01 4.34580e+00 115 2008 6 2.01740e+01 4.60364e-01 64 2008 7 1.67709e+01 1.79518e+00 128 2008 8 2.08173e+01 4.85482e+00 226 2008 9 1.56905e+01 1.53054e+00 128 2008 10 1.42451e+01 5.98169e+00 205 2008 11 1.24041e+01 5.12757e+00 476 2008 12 9.22061e+00 2.37077e+00 542 2009 1 1.46902e+01 4.72321e+00 487 2009 2 1.37872e+01 4.33085e+00 377 2009 3 1.73397e+01 9.51417e+00 183 2009 4 1.14674e+01 6.09328e+00 230 2009 5 8.94513e+00 5.13925e+00 153 2009 6 nan nan 0 2009 7 1.69134e+01 3.23147e+00 104 2009 8 2.51615e+01 2.78530e+00 129 2009 9 2.15308e+01 6.30829e+00 33 2009 10 1.77901e+01 3.66475e+00 384 2009 11 1.15598e+01 3.10706e+00 369 2009 12 9.70813e+00 3.63153e+00 426 2010 1 5.80659e+00 3.51999e+00 457 2010 2 1.51341e+01 3.60369e+00 397 2010 3 2.30462e+01 4.67865e+00 193 2010 4 1.74090e+01 1.99104e+00 97 2010 5 1.82589e+01 6.80581e+00 127 2010 6 1.98244e+01 1.78828e+00 190 2010 7 8.91673e+00 3.77297e-01 64 2010 8 1.21437e+01 2.14145e+00 62 2010 9 1.33093e+01 3.29575e+00 325 2010 10 1.55955e+01 1.72824e+00 290 2010 11 9.39708e+00 4.37765e+00 392 2010 12 8.22817e+00 2.61771e+00 298 2011 1 1.36917e+01 5.59709e+00 510 2011 2 1.23135e+01 4.51264e+00 543 2011 3 1.44077e+01 1.94666e+00 316 2011 4 2.04532e+01 2.70696e+00 414 2011 5 2.24275e+01 3.50348e+00 159 2011 6 2.18678e+01 0.00000e+00 2 2011 7 2.38989e+01 3.88565e+00 42 2011 8 3.54032e+01 0.00000e+00 1 2011 9 1.45265e+01 4.05252e+00 75 2011 10 1.53983e+01 3.36440e+00 280 2011 11 1.48453e+01 1.98352e+00 229 2011 12 8.58628e+00 4.84725e+00 633 2012 1 8.86104e+00 2.14621e+00 420 2012 2 1.29138e+01 5.20161e+00 516 2012 3 2.51804e+01 3.84506e+00 130 2012 4 1.34151e+01 5.13786e+00 221 2012 5 nan nan 0 2012 6 1.52436e+01 1.36687e+00 34 2012 7 1.39649e+01 1.01405e+00 34 2012 8 1.83564e+01 4.43398e+00 182 2012 9 1.97902e+01 6.47220e+00 153 2012 10 1.30615e+01 5.08076e+00 88 2012 11 1.26636e+01 2.86874e+00 369 2012 12 1.00320e+01 3.89645e+00 542 2013 1 4.93877e+00 1.95777e+00 384 2013 2 7.86727e+00 3.61164e+00 455 2013 3 1.80137e+01 4.94537e+00 210 2013 4 2.38681e+01 6.20435e+00 212 2013 5 2.21806e+01 5.13961e+00 71 2013 6 nan nan 0 2013 7 1.61004e+01 2.85916e+00 193 2013 8 1.64973e+01 1.79580e+00 37 2013 9 2.08560e+01 1.21196e+01 80 2013 10 1.67309e+01 2.48990e+00 143 2013 11 1.24949e+01 4.26019e+00 347 2013 12 1.09508e+01 3.05865e+00 520 2014 1 9.11582e+00 2.76195e+00 662 2014 2 1.07024e+01 3.85888e+00 201 2014 3 1.39583e+01 7.02256e+00 262 2014 4 2.62029e+01 1.11624e+01 74 2014 5 2.01232e+01 3.52441e+00 183 2014 6 2.00059e+01 4.35750e+00 86 2014 7 2.07811e+01 2.97898e-01 13 2014 8 2.06519e+01 8.92412e+00 187 2014 9 1.58729e+01 9.82123e+00 11 2014 10 1.67227e+01 4.44045e+00 226 2014 11 1.23808e+01 2.84179e+00 389 2014 12 1.35847e+01 4.32918e+00 418 2015 1 1.22346e+01 3.15335e+00 540 2015 2 1.16667e+01 4.18659e+00 386 2015 3 1.36259e+01 2.64778e+00 419 2015 4 1.60672e+01 2.35522e+00 153 2015 5 2.03450e+01 4.79310e+00 75 2015 6 nan nan 0 2015 7 1.36385e+01 5.19492e-01 60 2015 8 2.19698e+01 4.90162e+00 192 2015 9 1.41208e+01 1.16859e+00 231 2015 10 1.42732e+01 4.44226e+00 305 2015 11 1.61503e+01 3.32961e+00 185 2015 12 1.16006e+01 3.86356e+00 327 2016 1 1.29116e+01 5.65271e+00 313 2016 2 1.14742e+01 3.03668e+00 183 2016 3 1.29945e+01 3.38715e+00 270 2016 4 2.46134e+01 6.84520e+00 149 2016 5 nan nan 0 2016 6 9.48551e-01 6.80607e-01 10 2016 7 1.92640e+01 4.81420e+00 128 2016 8 1.77577e+01 2.50152e+00 104 2016 9 1.96453e+01 2.58068e+00 149 2016 10 1.93676e+01 2.96184e+00 244 2016 11 1.27883e+01 1.56386e+00 215 2016 12 5.55084e+00 2.40267e+00 143 2017 1 7.61977e+00 4.75452e+00 484 2017 2 1.75087e+01 3.38074e+00 486 2017 3 7.88700e+00 5.01539e+00 194 2017 4 1.36346e+01 3.27700e+00 188 2017 5 1.40150e+01 7.06274e-01 36 2017 6 1.74063e+01 3.82396e+00 95 2017 7 1.70930e+01 4.87282e+00 140 2017 8 1.61428e+01 1.84707e+00 123 2017 9 8.89153e+00 7.29536e+00 86 2017 10 1.33089e+01 3.33771e+00 132 2017 11 1.43702e+01 3.43589e+00 192 2017 12 9.81199e+00 3.74405e+00 423 2018 1 9.37762e+00 4.63791e+00 531 2018 2 1.04294e+01 5.41584e+00 324 2018 3 2.31661e+00 1.66495e+00 315 2018 4 2.14613e+01 8.14631e+00 137 2018 5 2.00041e+01 3.53544e+00 110 2018 6 2.23487e+01 1.50974e+01 111 2018 7 2.11090e+01 2.83675e+00 86 2018 8 2.04442e+01 2.87411e+00 93 2018 9 1.68927e+01 1.04515e+00 51 2018 10 1.34862e+01 3.72558e+00 349 2018 11 1.32970e+01 2.33924e+00 516 2018 12 9.44262e+00 2.97457e+00 249 2019 1 1.28781e+01 3.51866e+00 401 2019 2 1.61473e+01 2.31146e+00 208 2019 3 1.73296e+01 7.17554e+00 230 2019 4 2.11088e+01 4.92443e+00 221 2019 5 nan nan 0 2019 6 2.01306e+01 2.40433e+00 101 2019 7 2.70372e+01 7.40343e+00 34 2019 8 2.24909e+01 3.40578e+00 69 2019 9 1.91278e+01 5.50261e+00 192 2019 10 1.50724e+01 3.91847e+00 419 2019 11 9.01782e+00 3.61158e+00 310 2019 12 1.15003e+01 6.22078e+00 294 2020 1 1.26115e+01 4.48932e+00 282 2020 2 1.23349e+01 3.97938e+00 279 2020 3 1.45449e+01 3.30321e+00 338 2020 4 2.18870e+01 3.18875e+00 373 2020 5 2.20025e+01 2.27542e+00 128 2020 6 1.78430e+01 4.23559e+00 167 2020 7 1.78347e+01 2.58862e+00 125 2020 8 2.37923e+01 4.36391e+00 150 2020 9 1.94128e+01 3.81719e+00 171 2020 10 1.64357e+01 2.16806e+00 258 2020 11 1.35401e+01 2.91955e+00 519 2020 12 1.10612e+01 2.60937e+00 576 2021 1 9.60821e+00 5.21574e+00 473 2021 2 1.06148e+01 4.88630e+00 489 2021 3 1.78013e+01 5.44795e+00 410 2021 4 2.34861e+01 7.93961e+00 337 2021 5 1.80837e+01 2.49248e+00 84 2021 6 1.09152e+01 9.07553e-01 30 2021 7 1.47926e+01 2.35922e+00 128 2021 8 1.60493e+01 2.40594e+00 125 2021 9 1.90593e+01 2.11035e+00 242 2021 10 1.91355e+01 4.22902e+00 363 2021 11 1.13577e+01 3.00994e+00 454 2021 12 7.29504e+00 2.06091e+00 333 2022 1 1.20854e+01 3.71895e+00 658 2022 2 1.11925e+01 4.21928e+00 386 2022 3 2.18035e+01 3.50636e+00 90 2022 4 2.95818e+01 4.42767e+00 79 2022 5 2.23177e+01 4.75275e+00 131 2022 6 3.29680e+01 5.03319e+00 79 2022 7 2.56449e+01 3.56504e+00 28 2022 8 2.07518e+01 8.51981e+00 70 2022 9 2.10415e+01 5.92125e+00 129 2022 10 1.85033e+01 3.89148e+00 191 2022 11 1.48673e+01 3.47824e+00 697 2022 12 1.11369e+01 4.33376e+00 704 2023 1 9.77887e+00 3.32370e+00 592 2023 2 1.15127e+01 4.37109e+00 527 2023 3 1.45229e+01 7.38760e+00 561 2023 4 2.33445e+01 5.98596e+00 388 2023 5 2.41653e+01 4.89766e+00 273 2023 6 2.55759e+01 2.44038e+00 128 2023 7 nan nan 0 2023 8 1.67615e+01 2.67900e+00 128 2023 9 1.87574e+01 5.53102e+00 191 2023 10 1.83136e+01 4.55797e+00 299 2023 11 1.78937e+01 2.90058e+00 456 2023 12 1.41603e+01 5.91979e+00 549 2024 1 1.09945e+01 5.82325e+00 490 2024 2 9.55141e+00 8.10572e+00 463 2024 3 2.27913e+01 5.23013e+00 276 2024 4 1.06935e+01 1.54635e+00 119