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 6.13569e+01 3.74396e-01 145 2002 8 5.75744e+01 1.22331e+00 81 2002 9 5.31412e+01 1.73250e+00 178 2002 10 4.46702e+01 1.72924e+00 253 2002 11 4.05622e+01 4.80422e-01 19 2002 12 3.43438e+01 5.66338e-01 97 2003 1 3.63035e+01 1.08256e+00 80 2003 2 4.39410e+01 2.19632e+00 188 2003 3 5.14599e+01 2.10820e+00 265 2003 4 5.79115e+01 1.06064e+00 225 2003 5 6.13851e+01 2.65528e-01 140 2003 6 6.20760e+01 1.94845e-01 165 2003 7 6.07554e+01 4.89070e-01 124 2003 8 5.73629e+01 2.92898e+00 118 2003 9 5.34813e+01 1.14139e+00 117 2003 10 4.51274e+01 1.84516e+00 333 2003 11 3.89155e+01 1.25969e+00 321 2003 12 3.41109e+01 1.13366e-01 23 2004 1 3.60585e+01 1.38164e+00 461 2004 2 4.23812e+01 2.30053e+00 255 2004 3 5.27816e+01 2.28634e+00 460 2004 4 5.84307e+01 1.61518e+00 187 2004 5 6.16180e+01 6.10621e-01 182 2004 6 6.21043e+01 3.31184e-01 410 2004 7 6.11808e+01 3.63746e-01 315 2004 8 5.81414e+01 8.62126e-01 157 2004 9 5.07344e+01 1.08966e+00 113 2004 10 4.41955e+01 1.99472e+00 178 2004 11 3.66840e+01 1.18382e+00 341 2004 12 3.44804e+01 4.03442e-01 87 2005 1 3.62863e+01 1.80866e+00 600 2005 2 4.33142e+01 1.73441e+00 379 2005 3 5.33898e+01 2.26206e+00 377 2005 4 5.72747e+01 1.77283e+00 270 2005 5 6.15090e+01 6.07244e-01 401 2005 6 6.14676e+01 7.19444e-01 115 2005 7 6.03706e+01 1.59045e+00 154 2005 8 5.78375e+01 2.68620e+00 195 2005 9 5.33585e+01 1.97349e+00 280 2005 10 4.67027e+01 7.92826e-01 112 2005 11 3.66710e+01 9.22472e-01 171 2005 12 3.42181e+01 2.36113e-01 23 2006 1 3.85898e+01 1.89820e+00 93 2006 2 4.54725e+01 1.34731e+00 463 2006 3 5.08266e+01 1.98235e+00 495 2006 4 5.76074e+01 1.65916e+00 462 2006 5 6.13951e+01 7.90313e-01 306 2006 6 6.21456e+01 2.37397e-01 522 2006 7 6.08695e+01 3.02063e-01 84 2006 8 5.93358e+01 8.00347e-01 215 2006 9 5.25265e+01 1.44587e+00 77 2006 10 4.53469e+01 1.46536e+00 156 2006 11 3.64420e+01 1.49877e+00 288 2006 12 3.40395e+01 3.14115e-01 185 2007 1 3.59615e+01 1.21047e+00 457 2007 2 4.29083e+01 2.62874e+00 329 2007 3 5.13431e+01 2.42234e+00 621 2007 4 5.81319e+01 1.48707e+00 355 2007 5 6.10253e+01 4.70980e-01 246 2007 6 6.21599e+01 2.34943e-01 136 2007 7 6.14553e+01 3.18342e-01 251 2007 8 5.84610e+01 1.19489e+00 259 2007 9 5.18013e+01 2.32911e+00 158 2007 10 4.61994e+01 2.01211e+00 46 2007 11 3.69095e+01 1.44313e+00 192 2007 12 3.42376e+01 4.64529e-01 349 2008 1 3.66011e+01 1.45333e+00 266 2008 2 4.32390e+01 2.55727e+00 504 2008 3 5.26962e+01 2.19326e+00 346 2008 4 5.78769e+01 1.17453e+00 439 2008 5 6.16310e+01 6.35019e-01 292 2008 6 6.21460e+01 1.80199e-01 203 2008 7 6.07953e+01 5.85342e-01 174 2008 8 5.86406e+01 9.08300e-01 172 2008 9 5.11561e+01 5.38574e+00 59 2008 10 4.65329e+01 1.57871e+00 166 2008 11 3.79663e+01 1.92540e+00 324 2008 12 3.41921e+01 4.89649e-01 458 2009 1 3.75922e+01 1.82546e+00 188 2009 2 4.39078e+01 2.29298e+00 469 2009 3 5.19514e+01 2.42776e+00 598 2009 4 5.86657e+01 1.31534e+00 186 2009 5 6.11863e+01 6.19672e-01 165 2009 6 6.22172e+01 1.78017e-01 369 2009 7 6.11126e+01 4.37502e-01 247 2009 8 5.89540e+01 1.57664e+00 160 2009 9 5.29220e+01 1.93574e+00 451 2009 10 4.78523e+01 1.83644e+00 232 2009 11 3.62257e+01 1.34225e+00 6 2009 12 3.41184e+01 3.91214e-01 189 2010 1 3.79515e+01 7.37847e-01 124 2010 2 4.48850e+01 2.90851e+00 54 2010 3 5.14348e+01 2.65070e+00 303 2010 4 5.80118e+01 1.31223e+00 236 2010 5 6.16216e+01 6.87791e-01 440 2010 6 6.20461e+01 3.37403e-01 480 2010 7 6.11191e+01 5.14912e-01 275 2010 8 5.96165e+01 6.80910e-01 172 2010 9 5.35947e+01 1.72335e+00 115 2010 10 4.31311e+01 1.92007e+00 252 2010 11 3.73683e+01 1.61063e+00 221 2010 12 3.44301e+01 4.63388e-01 68 2011 1 3.50419e+01 2.34581e-02 21 2011 2 4.52607e+01 2.44663e+00 214 2011 3 5.27022e+01 1.71186e+00 490 2011 4 5.77246e+01 1.09863e+00 371 2011 5 6.11899e+01 6.85626e-01 394 2011 6 6.21801e+01 1.94513e-01 171 2011 7 6.10889e+01 5.47813e-01 516 2011 8 5.87779e+01 7.77646e-01 183 2011 9 5.27989e+01 9.62616e-01 143 2011 10 4.73589e+01 2.07564e+00 72 2011 11 3.81841e+01 1.55699e+00 75 2011 12 3.38245e+01 1.71971e-01 56 2012 1 3.71396e+01 4.75849e-01 170 2012 2 4.50780e+01 2.23176e+00 459 2012 3 5.16503e+01 2.32805e+00 550 2012 4 5.77291e+01 1.54504e+00 342 2012 5 6.15911e+01 5.49679e-01 274 2012 6 6.20600e+01 3.17292e-01 245 2012 7 6.09970e+01 8.40901e-01 222 2012 8 5.95124e+01 6.93224e-01 186 2012 9 5.42888e+01 1.67782e+00 373 2012 10 4.59350e+01 1.73384e+00 570 2012 11 3.82597e+01 1.31028e+00 377 2012 12 3.38854e+01 5.11871e-01 322 2013 1 3.69255e+01 1.70718e+00 264 2013 2 4.40159e+01 2.60340e+00 402 2013 3 5.18158e+01 2.03241e+00 334 2013 4 5.81156e+01 1.39890e+00 210 2013 5 6.16297e+01 4.54809e-01 314 2013 6 6.21656e+01 1.85031e-01 71 2013 7 6.08729e+01 4.13711e-01 235 2013 8 5.93376e+01 9.77004e-01 120 2013 9 5.10417e+01 1.37046e+00 159 2013 10 4.53005e+01 1.82158e+00 160 2013 11 3.47985e+01 4.86589e-01 11 2013 12 3.40411e+01 2.90158e-01 76 2014 1 3.72640e+01 1.80780e+00 146 2014 2 4.37741e+01 2.02037e+00 306 2014 3 5.20745e+01 2.25817e+00 299 2014 4 5.87301e+01 1.46607e+00 273 2014 5 6.15194e+01 5.63819e-01 213 2014 6 6.20575e+01 2.16798e-01 339 2014 7 6.13134e+01 2.24416e-01 210 2014 8 5.89662e+01 8.65737e-01 70 2014 9 5.54248e+01 1.11889e+00 75 2014 10 4.62772e+01 2.30143e+00 120 2014 11 3.92416e+01 1.21764e+00 76 2014 12 3.43094e+01 2.90996e-01 171 2015 1 3.49416e+01 4.97304e-01 24 2015 2 4.41003e+01 1.37842e+00 90 2015 3 5.12570e+01 2.11166e+00 539 2015 4 5.68769e+01 1.28150e+00 224 2015 5 6.18977e+01 4.33465e-01 253 2015 6 6.21187e+01 2.10628e-01 220 2015 7 6.11852e+01 4.66048e-01 189 2015 8 5.91315e+01 6.04458e-01 249 2015 9 5.34908e+01 1.98083e+00 153 2015 10 4.54308e+01 1.43900e+00 152 2015 11 3.84044e+01 1.71181e+00 80 2015 12 3.39415e+01 1.81483e-01 34 2016 1 3.41404e+01 1.50130e-01 43 2016 2 4.34733e+01 2.61685e+00 152 2016 3 5.12752e+01 2.18798e+00 273 2016 4 5.77263e+01 1.39850e+00 301 2016 5 6.14755e+01 5.27317e-01 448 2016 6 6.20351e+01 3.13829e-01 325 2016 7 6.13667e+01 5.63125e-01 415 2016 8 5.91110e+01 9.35205e-01 375 2016 9 5.25275e+01 1.73642e+00 517 2016 10 4.56209e+01 1.82346e+00 144 2016 11 3.72865e+01 1.66957e+00 611 2016 12 3.39903e+01 4.15218e-01 147 2017 1 3.58522e+01 9.99432e-01 44 2017 2 4.51361e+01 2.04947e+00 239 2017 3 5.15235e+01 1.74827e+00 171 2017 4 5.79037e+01 1.99262e+00 155 2017 5 6.10768e+01 5.14271e-01 199 2017 6 6.20671e+01 2.02535e-01 110 2017 7 6.08887e+01 3.24764e-01 129 2017 8 5.86015e+01 1.24496e+00 266 2017 9 5.48135e+01 1.05756e+00 118 2017 10 4.25481e+01 4.74967e-01 86 2017 11 3.89753e+01 1.56310e+00 272 2017 12 3.41196e+01 4.16346e-01 223 2018 1 3.53767e+01 1.63139e-01 12 2018 2 4.45016e+01 1.50852e+00 230 2018 3 5.17805e+01 2.40695e+00 636 2018 4 5.81351e+01 1.42283e+00 602 2018 5 6.13233e+01 4.89599e-01 249 2018 6 6.21288e+01 2.14874e-01 275 2018 7 6.08550e+01 5.42957e-01 431 2018 8 5.89543e+01 9.08441e-01 231 2018 9 5.29352e+01 1.82043e+00 323 2018 10 4.42691e+01 2.11645e+00 509 2018 11 3.85100e+01 1.37316e+00 408 2018 12 3.44571e+01 3.91697e-01 167 2019 1 3.62319e+01 1.02283e+00 162 2019 2 4.45179e+01 2.01576e+00 548 2019 3 5.12167e+01 2.70478e+00 354 2019 4 5.80632e+01 1.37094e+00 262 2019 5 6.12528e+01 7.74529e-01 338 2019 6 6.21352e+01 1.97973e-01 387 2019 7 6.09008e+01 6.45908e-01 353 2019 8 5.83012e+01 1.35867e+00 180 2019 9 5.18463e+01 1.73101e+00 101 2019 10 4.51116e+01 2.25534e+00 229 2019 11 3.69697e+01 1.55436e+00 161 2019 12 3.44415e+01 4.91133e-01 131 2020 1 3.47730e+01 9.71793e-01 122 2020 2 4.49025e+01 1.53534e+00 430 2020 3 5.14234e+01 2.33904e+00 414 2020 4 5.83155e+01 1.31485e+00 186 2020 5 6.12350e+01 4.92965e-01 236 2020 6 6.21541e+01 1.78635e-01 191 2020 7 6.09054e+01 6.52372e-01 238 2020 8 5.86349e+01 1.53454e+00 240 2020 9 5.12965e+01 8.60421e-01 104 2020 10 4.37485e+01 2.19663e+00 84 2020 11 3.83411e+01 2.18704e+00 133 2020 12 3.36266e+01 1.10216e-01 40 2021 1 nan nan 0 2021 2 4.55510e+01 1.75127e+00 323 2021 3 5.19109e+01 2.32002e+00 556 2021 4 5.71814e+01 1.95294e+00 218 2021 5 6.16539e+01 6.33195e-01 262 2021 6 6.20965e+01 2.06262e-01 205 2021 7 6.08101e+01 6.56027e-01 176 2021 8 5.93535e+01 5.26298e-01 180 2021 9 5.15265e+01 1.33435e+00 243 2021 10 4.68477e+01 9.95237e-01 131 2021 11 3.70658e+01 1.72266e+00 173 2021 12 3.40217e+01 2.71850e-01 492 2022 1 3.49684e+01 7.19932e-01 147 2022 2 4.53077e+01 2.05475e+00 402 2022 3 5.05485e+01 2.40408e+00 538 2022 4 5.94917e+01 6.64083e-01 101 2022 5 6.11330e+01 4.34585e-01 119 2022 6 6.20619e+01 1.96138e-01 236 2022 7 6.11177e+01 5.05978e-01 262 2022 8 5.79602e+01 7.42551e-01 184 2022 9 5.32941e+01 1.91421e+00 134 2022 10 4.65927e+01 3.26448e+00 12 2022 11 3.57966e+01 8.70518e-01 29 2022 12 3.43284e+01 2.80038e-01 186 2023 1 3.76470e+01 1.46847e+00 88 2023 2 4.39065e+01 2.56951e+00 512 2023 3 5.21424e+01 2.29997e+00 425 2023 4 5.71154e+01 1.10583e+00 225 2023 5 6.12673e+01 7.95080e-01 572 2023 6 6.21673e+01 2.01310e-01 414 2023 7 6.15016e+01 4.68915e-01 376 2023 8 5.94354e+01 9.66363e-01 224 2023 9 5.28304e+01 2.17694e+00 125 2023 10 4.45182e+01 2.81619e+00 141 2023 11 3.79869e+01 1.10448e+00 108 2023 12 3.43723e+01 3.22315e-01 99 2024 1 3.71184e+01 1.84456e+00 141 2024 2 4.48150e+01 2.43568e+00 646 2024 3 5.31204e+01 2.64698e+00 332 2024 4 5.61181e+01 1.27378e-02 34