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 2.73858e+01 1.32991e+01 369 2002 8 3.39126e+01 5.47601e+00 240 2002 9 1.95464e+01 3.72612e+00 90 2002 10 2.15725e+01 7.98625e+00 421 2002 11 2.05245e+01 5.04142e+00 327 2002 12 1.93352e+01 4.48518e+00 537 2003 1 2.02724e+01 3.43814e+00 319 2003 2 1.86533e+01 5.16813e+00 278 2003 3 2.45370e+01 7.79169e+00 360 2003 4 2.71364e+01 1.20230e+01 482 2003 5 3.53074e+01 4.73385e+00 314 2003 6 3.62593e+01 6.45922e+00 144 2003 7 3.38021e+01 1.05151e+01 164 2003 8 3.08593e+01 5.42783e+00 154 2003 9 2.78645e+01 1.19100e+01 230 2003 10 1.71747e+01 3.67061e+00 152 2003 11 1.55697e+01 4.00188e+00 118 2003 12 1.84135e+01 5.87422e+00 99 2004 1 2.15871e+01 5.72969e+00 469 2004 2 2.59782e+01 4.38013e+00 441 2004 3 2.72052e+01 8.50133e+00 727 2004 4 2.50183e+01 1.00637e+01 296 2004 5 3.51121e+01 5.66934e+00 366 2004 6 2.68103e+01 8.18857e+00 217 2004 7 2.81811e+01 7.25581e+00 106 2004 8 2.24145e+01 9.98267e+00 27 2004 9 2.62684e+01 9.38158e+00 371 2004 10 2.36630e+01 6.41278e+00 546 2004 11 2.14711e+01 6.12838e+00 617 2004 12 2.00119e+01 5.77276e+00 480 2005 1 1.97944e+01 5.39830e+00 435 2005 2 2.41289e+01 4.99266e+00 439 2005 3 2.66759e+01 9.37690e+00 350 2005 4 3.04218e+01 6.74600e+00 267 2005 5 3.33468e+01 1.08694e+01 449 2005 6 3.12576e+01 6.42439e+00 162 2005 7 3.04080e+01 1.08428e+01 211 2005 8 3.43195e+01 9.40515e+00 116 2005 9 2.13118e+01 1.09569e+01 150 2005 10 1.27791e+01 1.03343e+01 139 2005 11 1.26135e+01 1.04050e+01 366 2005 12 4.01782e+00 2.98611e+00 658 2006 1 1.31920e+01 6.43215e+00 277 2006 2 7.80198e+00 4.91560e+00 194 2006 3 1.92545e+01 1.05087e+01 617 2006 4 2.61217e+01 1.11111e+01 560 2006 5 3.17236e+01 8.43955e+00 214 2006 6 3.32239e+01 8.64513e+00 127 2006 7 3.41060e+01 6.34024e+00 90 2006 8 3.11756e+01 1.11467e+01 322 2006 9 2.28661e+01 9.67989e+00 191 2006 10 2.48567e+01 3.88704e+00 269 2006 11 1.80637e+01 7.46358e+00 685 2006 12 1.85319e+01 4.29583e+00 412 2007 1 1.87025e+01 4.06680e+00 763 2007 2 2.05958e+01 8.31264e+00 385 2007 3 2.55700e+01 9.31909e+00 755 2007 4 3.18346e+01 9.67587e+00 350 2007 5 2.49326e+01 1.14885e+01 386 2007 6 2.89959e+01 8.12775e+00 215 2007 7 2.62871e+01 1.36378e+01 243 2007 8 2.86039e+01 1.20509e+01 182 2007 9 3.01705e+01 8.63229e+00 206 2007 10 2.09970e+01 6.12050e+00 141 2007 11 2.30849e+01 5.12089e+00 358 2007 12 1.86058e+01 5.86844e+00 624 2008 1 2.07902e+01 6.17637e+00 700 2008 2 2.18662e+01 4.19331e+00 405 2008 3 2.18852e+01 9.00662e+00 445 2008 4 2.67955e+01 1.14924e+01 636 2008 5 3.18070e+01 1.09399e+01 482 2008 6 3.51472e+01 1.17610e+01 259 2008 7 3.20929e+01 1.14323e+01 344 2008 8 3.46372e+01 6.88045e+00 195 2008 9 2.38756e+01 9.29608e+00 208 2008 10 2.31452e+01 9.23862e+00 438 2008 11 1.92397e+01 6.98733e+00 446 2008 12 1.78886e+01 6.29618e+00 500 2009 1 2.11325e+01 5.27724e+00 168 2009 2 1.99000e+01 9.01337e+00 614 2009 3 2.19270e+01 9.90879e+00 527 2009 4 2.43543e+01 1.28714e+01 443 2009 5 2.60215e+01 1.19936e+01 479 2009 6 2.91911e+01 1.03854e+01 212 2009 7 3.33489e+01 5.63723e+00 143 2009 8 3.14408e+01 9.32300e+00 146 2009 9 2.55448e+01 1.06071e+01 563 2009 10 2.65890e+01 4.77714e+00 594 2009 11 1.79832e+01 4.79080e+00 204 2009 12 1.60745e+01 5.97706e+00 188 2010 1 1.98437e+01 6.08482e+00 263 2010 2 1.60987e+01 8.62440e+00 90 2010 3 2.22959e+01 1.08878e+01 186 2010 4 2.63328e+01 1.25361e+01 679 2010 5 2.53757e+01 1.34583e+01 291 2010 6 3.17408e+01 5.06871e+00 109 2010 7 3.67615e+01 6.25336e+00 109 2010 8 3.25033e+01 9.87616e+00 312 2010 9 3.36313e+01 8.67531e+00 152 2010 10 2.28268e+01 4.23236e+00 195 2010 11 2.13163e+01 7.07337e+00 749 2010 12 1.85991e+01 4.80789e+00 280 2011 1 1.67155e+01 4.23622e+00 136 2011 2 2.24650e+01 6.46968e+00 166 2011 3 3.13766e+01 1.12424e+01 315 2011 4 3.11658e+01 9.59863e+00 626 2011 5 2.19250e+01 1.08425e+01 410 2011 6 3.88343e+01 8.43750e+00 147 2011 7 3.25745e+01 4.99774e+00 96 2011 8 3.89304e+01 5.42723e+00 138 2011 9 2.89229e+01 8.64019e+00 283 2011 10 2.14296e+01 6.59919e+00 23 2011 11 2.01213e+01 4.65511e+00 581 2011 12 1.66378e+01 4.56776e+00 392 2012 1 2.18244e+01 4.39173e+00 505 2012 2 2.40700e+01 4.28979e+00 272 2012 3 2.84113e+01 5.74817e+00 357 2012 4 3.50061e+01 3.82558e+00 263 2012 5 3.08200e+01 5.15393e+00 134 2012 6 2.38125e+01 1.19967e+01 145 2012 7 2.25053e+01 4.35833e+00 55 2012 8 2.83772e+01 5.06853e+00 196 2012 9 2.36850e+01 6.02975e+00 163 2012 10 2.04888e+01 8.50257e+00 235 2012 11 2.14341e+01 4.44215e+00 415 2012 12 1.91018e+01 6.09145e+00 329 2013 1 1.81755e+01 6.11134e+00 556 2013 2 2.46509e+01 6.97009e+00 478 2013 3 2.76889e+01 9.58595e+00 409 2013 4 2.90737e+01 1.03009e+01 364 2013 5 3.18232e+01 1.21362e+01 349 2013 6 2.47727e+01 1.18128e+01 170 2013 7 3.44333e+01 9.86015e+00 89 2013 8 3.04894e+01 9.14954e+00 195 2013 9 2.85065e+01 5.29676e+00 227 2013 10 2.56179e+01 5.87311e+00 455 2013 11 2.09738e+01 5.34327e+00 399 2013 12 1.82108e+01 2.81873e+00 378 2014 1 2.18808e+01 4.21526e+00 488 2014 2 2.49920e+01 4.75620e+00 418 2014 3 2.48907e+01 4.58735e+00 166 2014 4 3.59630e+01 6.19246e+00 275 2014 5 3.35988e+01 1.16316e+01 460 2014 6 3.16345e+01 1.22662e+01 277 2014 7 3.48399e+01 7.98410e+00 226 2014 8 3.50444e+01 9.74635e+00 130 2014 9 3.39087e+01 4.21690e+00 121 2014 10 2.48677e+01 6.41379e+00 246 2014 11 2.02145e+01 6.42889e+00 708 2014 12 1.86518e+01 3.91898e+00 327 2015 1 1.93665e+01 4.55227e+00 313 2015 2 2.28693e+01 6.56721e+00 306 2015 3 2.64306e+01 6.32675e+00 645 2015 4 3.23896e+01 9.25904e+00 437 2015 5 3.73751e+01 6.89172e+00 438 2015 6 3.92262e+01 7.40928e+00 325 2015 7 2.73276e+01 7.59254e+00 114 2015 8 3.57999e+01 5.06753e+00 104 2015 9 2.97179e+01 5.34695e+00 83 2015 10 1.92342e+01 5.89713e+00 286 2015 11 1.78527e+01 4.34560e+00 297 2015 12 2.03339e+01 3.71791e+00 208 2016 1 1.94439e+01 2.37388e+00 64 2016 2 2.20708e+01 7.19270e+00 447 2016 3 2.57426e+01 1.13803e+01 294 2016 4 2.60650e+01 1.03937e+01 237 2016 5 3.28002e+01 7.56212e+00 429 2016 6 2.82554e+01 9.02758e+00 81 2016 7 3.27641e+01 1.05420e+01 167 2016 8 2.96807e+01 7.72423e+00 166 2016 9 2.17553e+01 6.50338e+00 258 2016 10 1.77899e+01 3.77741e+00 147 2016 11 2.05183e+01 4.39832e+00 472 2016 12 1.84767e+01 4.97340e+00 270 2017 1 1.93379e+01 6.76324e+00 385 2017 2 2.36143e+01 4.53827e+00 367 2017 3 2.04547e+01 9.75267e+00 521 2017 4 3.26246e+01 4.98820e+00 423 2017 5 2.89441e+01 1.36663e+01 527 2017 6 2.42269e+01 1.20008e+01 302 2017 7 3.18976e+01 8.80297e+00 95 2017 8 2.99349e+01 6.94378e+00 253 2017 9 2.63639e+01 5.08765e+00 225 2017 10 1.41510e+01 4.37554e+00 127 2017 11 1.76280e+01 4.95313e+00 799 2017 12 1.77619e+01 3.68998e+00 364 2018 1 1.38657e+01 5.00371e+00 62 2018 2 1.89930e+01 1.13089e+01 342 2018 3 2.59463e+01 8.94073e+00 735 2018 4 2.66232e+01 8.18747e+00 352 2018 5 2.63280e+01 3.77224e+00 40 2018 6 3.13639e+01 1.02511e+01 181 2018 7 3.54692e+01 9.41279e+00 304 2018 8 3.20946e+01 1.12392e+01 90 2018 9 1.86451e+01 8.14397e+00 147 2018 10 1.87158e+01 6.75875e+00 144 2018 11 1.76367e+01 3.60257e+00 194 2018 12 1.71550e+01 4.17809e+00 556 2019 1 1.85897e+01 3.04406e+00 371 2019 2 2.27425e+01 7.83242e+00 726 2019 3 2.90925e+01 8.54507e+00 594 2019 4 2.75128e+01 9.78669e+00 375 2019 5 2.38175e+01 1.49321e+01 387 2019 6 3.10148e+01 1.29537e+01 568 2019 7 2.66858e+01 1.28551e+01 451 2019 8 3.55458e+01 6.85143e+00 197 2019 9 3.04826e+01 6.90459e+00 297 2019 10 2.06509e+01 7.39323e+00 722 2019 11 2.18452e+01 3.46069e+00 652 2019 12 2.08830e+01 3.63273e+00 405 2020 1 1.65596e+01 4.24506e+00 194 2020 2 1.76698e+01 4.09156e+00 148 2020 3 2.78796e+01 5.92414e+00 570 2020 4 2.92968e+01 4.83987e+00 142 2020 5 3.17459e+01 5.60081e+00 236 2020 6 3.38264e+01 7.29965e+00 288 2020 7 3.32166e+01 5.93787e+00 229 2020 8 2.95966e+01 1.25279e+01 260 2020 9 2.37541e+01 9.41779e+00 416 2020 10 2.13507e+01 5.85558e+00 226 2020 11 1.46660e+01 4.08562e+00 360 2020 12 1.94629e+01 3.83294e+00 415 2021 1 1.61872e+01 5.90713e+00 233 2021 2 2.18892e+01 6.54502e+00 349 2021 3 2.77023e+01 6.24514e+00 542 2021 4 3.25340e+01 8.50809e+00 645 2021 5 3.32493e+01 1.20282e+01 197 2021 6 2.28820e+01 1.62234e+01 160 2021 7 2.82927e+01 1.24787e+01 406 2021 8 2.72172e+01 5.05390e+00 69 2021 9 2.67557e+01 6.26609e+00 266 2021 10 2.49739e+01 4.30587e+00 111 2021 11 1.94620e+01 7.97184e+00 344 2021 12 1.76388e+01 6.13853e+00 788 2022 1 1.94099e+01 5.18263e+00 428 2022 2 2.41509e+01 4.92996e+00 513 2022 3 2.38414e+01 9.39122e+00 504 2022 4 3.12176e+01 4.54079e+00 103 2022 5 3.76177e+01 5.41938e+00 169 2022 6 3.81969e+01 7.60888e+00 16 2022 7 2.83640e+01 1.07533e+01 211 2022 8 3.48616e+01 9.61152e+00 330 2022 9 2.09692e+01 8.56546e+00 212 2022 10 1.82032e+01 7.56479e+00 211 2022 11 2.13194e+01 6.52350e+00 560 2022 12 1.98609e+01 4.20724e+00 563 2023 1 1.98488e+01 4.51183e+00 392 2023 2 2.12837e+01 8.96455e+00 900 2023 3 2.40744e+01 9.50830e+00 742 2023 4 2.67916e+01 1.07849e+01 225 2023 5 2.60331e+01 9.88392e+00 262 2023 6 2.41083e+01 7.74531e+00 155 2023 7 3.17128e+01 6.08448e+00 357 2023 8 3.20049e+01 7.93234e+00 127 2023 9 3.26865e+01 6.85428e+00 70 2023 10 1.78286e+01 4.27544e+00 305 2023 11 2.15133e+01 3.75278e+00 348 2023 12 1.86277e+01 4.93399e+00 361 2024 1 2.15216e+01 4.72637e+00 400 2024 2 2.10906e+01 4.86162e+00 235 2024 3 2.68682e+01 8.52300e+00 472 2024 4 3.84332e+01 3.14286e+00 64