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 1.08946e+00 1.82249e-01 148 2002 8 1.07499e+00 2.20583e-01 82 2002 9 1.06999e+00 9.41462e-02 254 2002 10 1.13605e+00 1.06900e-01 409 2002 11 1.11615e+00 1.64220e-01 553 2002 12 1.26887e+00 1.19433e-01 398 2003 1 1.01010e+00 1.78493e-01 467 2003 2 1.44457e+00 2.21610e-01 499 2003 3 1.59147e+00 2.72847e-01 183 2003 4 1.77228e+00 2.33139e-01 367 2003 5 1.69713e+00 2.80348e-01 302 2003 6 1.88766e+00 2.10842e-01 59 2003 7 8.12317e-01 1.47263e-01 135 2003 8 8.17181e-01 5.73153e-01 142 2003 9 1.18880e+00 3.05709e-01 237 2003 10 1.19991e+00 2.41986e-01 444 2003 11 1.42944e+00 2.55508e-01 578 2003 12 1.56149e+00 1.77285e-01 604 2004 1 1.48650e+00 2.83625e-01 661 2004 2 1.34902e+00 3.47423e-01 473 2004 3 1.65428e+00 4.43639e-01 374 2004 4 2.06714e+00 4.48879e-01 306 2004 5 2.26277e+00 5.11236e-01 311 2004 6 1.80050e+00 3.94550e-01 318 2004 7 1.42474e+00 1.11994e-01 312 2004 8 1.14554e+00 1.74424e-01 285 2004 9 8.16061e-01 1.12669e-01 95 2004 10 7.69945e-01 1.91597e-01 380 2004 11 1.01116e+00 1.94020e-01 491 2004 12 1.04878e+00 1.99367e-01 419 2005 1 1.31575e+00 3.11074e-01 728 2005 2 1.40739e+00 2.41724e-01 468 2005 3 1.49344e+00 1.55690e-01 268 2005 4 1.35886e+00 3.68035e-01 344 2005 5 1.70719e+00 2.24074e-01 195 2005 6 8.48763e-01 1.81969e-01 22 2005 7 8.07625e-01 2.25926e-01 174 2005 8 8.45349e-01 3.45667e-01 236 2005 9 1.23141e+00 2.51863e-01 328 2005 10 1.13384e+00 2.43052e-01 394 2005 11 1.05784e+00 2.17126e-01 448 2005 12 1.11208e+00 2.75972e-01 619 2006 1 1.11259e+00 2.22247e-01 499 2006 2 1.63413e+00 4.88893e-01 605 2006 3 1.48226e+00 2.47355e-01 664 2006 4 2.33400e+00 4.38233e-01 278 2006 5 2.27824e+00 4.16337e-01 362 2006 6 1.38272e+00 3.53669e-01 242 2006 7 1.08243e+00 0.00000e+00 1 2006 8 1.79433e+00 3.39821e-01 265 2006 9 8.05439e-01 2.42248e-01 329 2006 10 1.22916e+00 3.08554e-01 680 2006 11 1.66477e+00 2.58686e-01 586 2006 12 1.56394e+00 3.25390e-01 189 2007 1 1.58875e+00 3.06594e-01 526 2007 2 1.71292e+00 3.13206e-01 665 2007 3 1.39600e+00 3.11254e-01 168 2007 4 1.95665e+00 2.51374e-01 213 2007 5 1.81626e+00 3.10743e-01 97 2007 6 1.43809e+00 1.89665e-01 330 2007 7 1.55499e+00 2.60678e-01 290 2007 8 1.30598e+00 3.39553e-01 126 2007 9 1.53047e+00 1.63501e-01 357 2007 10 1.22516e+00 3.53655e-01 238 2007 11 2.10712e+00 4.39117e-01 649 2007 12 1.80378e+00 3.52532e-01 682 2008 1 1.87402e+00 4.58263e-01 502 2008 2 2.02372e+00 3.27186e-01 526 2008 3 1.85234e+00 2.61472e-01 509 2008 4 1.96183e+00 3.78202e-01 383 2008 5 1.30970e+00 9.96767e-02 225 2008 6 1.43247e+00 1.20880e-01 219 2008 7 1.38694e+00 6.20740e-02 137 2008 8 1.63011e+00 1.41160e-01 168 2008 9 9.47340e-01 2.62204e-01 159 2008 10 9.66126e-01 1.55630e-01 472 2008 11 1.63437e+00 2.16137e-01 711 2008 12 1.40524e+00 2.35325e-01 924 2009 1 1.41825e+00 2.13599e-01 695 2009 2 1.35401e+00 1.77308e-01 682 2009 3 1.58666e+00 2.37961e-01 295 2009 4 1.34327e+00 1.68038e-01 172 2009 5 1.33096e+00 9.44844e-02 301 2009 6 1.16608e+00 1.36307e-01 158 2009 7 1.23168e+00 6.76831e-02 243 2009 8 1.13483e+00 1.01147e-01 175 2009 9 1.24692e+00 4.73454e-01 207 2009 10 1.45709e+00 1.84168e-01 634 2009 11 1.56522e+00 1.76818e-01 449 2009 12 1.57826e+00 2.75755e-01 369 2010 1 1.50092e+00 3.51662e-01 539 2010 2 1.14490e+00 2.89152e-01 378 2010 3 1.56177e+00 2.66296e-01 518 2010 4 1.67636e+00 3.11975e-01 310 2010 5 1.39292e+00 2.29719e-01 320 2010 6 1.40847e+00 2.27051e-01 397 2010 7 1.29362e+00 1.44106e-01 122 2010 8 1.18542e+00 1.75881e-01 162 2010 9 1.16479e+00 1.27851e-01 63 2010 10 1.39124e+00 2.89223e-01 705 2010 11 1.38551e+00 2.72703e-01 714 2010 12 1.23347e+00 3.03234e-01 666 2011 1 1.35971e+00 2.34800e-01 434 2011 2 1.41071e+00 3.68052e-01 702 2011 3 1.57622e+00 3.53896e-01 777 2011 4 1.40809e+00 1.94901e-01 395 2011 5 1.31595e+00 1.41652e-01 250 2011 6 1.34809e+00 1.06904e-01 233 2011 7 1.54801e+00 1.34731e-01 189 2011 8 1.34719e+00 9.15656e-02 134 2011 9 1.33590e+00 1.28517e-01 275 2011 10 1.24319e+00 1.61564e-01 312 2011 11 1.12913e+00 1.76566e-01 542 2011 12 1.02674e+00 1.43124e-01 756 2012 1 1.23259e+00 2.51635e-01 719 2012 2 1.45884e+00 3.37322e-01 537 2012 3 1.35261e+00 2.95960e-01 503 2012 4 1.43813e+00 9.48464e-02 195 2012 5 1.38675e+00 1.34676e-01 284 2012 6 1.33390e+00 1.18681e-01 58 2012 7 1.65512e+00 8.72776e-02 98 2012 8 1.70674e+00 1.89664e-01 106 2012 9 1.34028e+00 5.58665e-01 228 2012 10 9.79321e-01 2.44886e-01 386 2012 11 1.11549e+00 1.92680e-01 495 2012 12 1.05397e+00 1.58345e-01 402 2013 1 1.23168e+00 1.18131e-01 625 2013 2 1.38886e+00 1.79411e-01 684 2013 3 1.48888e+00 2.34103e-01 535 2013 4 1.49440e+00 1.08845e-01 267 2013 5 1.67552e+00 2.64331e-01 324 2013 6 1.54161e+00 1.72648e-01 242 2013 7 6.76812e-01 2.00501e-01 107 2013 8 1.17736e+00 9.34930e-01 43 2013 9 7.56585e-01 2.16414e-01 107 2013 10 1.35074e+00 4.09916e-01 622 2013 11 1.35430e+00 1.46399e-01 183 2013 12 1.27804e+00 1.94109e-01 570 2014 1 1.48061e+00 3.11474e-01 609 2014 2 1.53820e+00 3.45773e-01 623 2014 3 1.42789e+00 2.98614e-01 591 2014 4 1.37068e+00 2.59061e-01 341 2014 5 1.09226e+00 1.47674e-01 173 2014 6 1.57366e+00 1.15472e-01 161 2014 7 1.45863e+00 1.19160e-01 189 2014 8 1.61932e+00 2.50530e-01 210 2014 9 1.23262e+00 8.67792e-02 244 2014 10 1.17134e+00 2.00810e-01 582 2014 11 1.25698e+00 2.71852e-01 629 2014 12 1.56368e+00 3.87475e-01 576 2015 1 1.23882e+00 2.85839e-01 537 2015 2 1.55505e+00 3.21270e-01 505 2015 3 1.58029e+00 2.14141e-01 636 2015 4 1.53644e+00 2.08219e-01 120 2015 5 1.44140e+00 2.24502e-01 284 2015 6 1.60215e+00 1.33391e-01 198 2015 7 1.48546e+00 1.49485e-01 80 2015 8 1.50623e+00 1.20505e-01 228 2015 9 1.26635e+00 9.67983e-01 229 2015 10 1.16055e+00 9.97092e-02 284 2015 11 1.41657e+00 2.41027e-01 568 2015 12 1.27232e+00 3.89790e-01 244 2016 1 1.37087e+00 2.84324e-01 269 2016 2 7.55034e-01 2.05546e-01 478 2016 3 1.02724e+00 1.18724e-01 340 2016 4 1.14437e+00 2.03451e-01 308 2016 5 1.76539e+00 3.67480e-01 280 2016 6 1.66452e+00 2.41198e-01 189 2016 7 9.15387e-01 1.87872e-01 212 2016 8 9.45244e-01 2.08040e-01 130 2016 9 1.69093e+00 1.83564e+00 332 2016 10 1.07913e+00 2.75193e-01 286 2016 11 1.34533e+00 2.28120e-01 550 2016 12 1.35723e+00 1.41671e-01 527 2017 1 1.24136e+00 3.23041e-01 503 2017 2 1.34813e+00 1.58048e-01 619 2017 3 1.35003e+00 2.18960e-01 507 2017 4 1.40160e+00 1.06811e-01 249 2017 5 1.41894e+00 3.59095e-01 341 2017 6 1.68924e+00 9.67878e-02 144 2017 7 1.44497e+00 1.17849e-01 57 2017 8 1.18227e+00 3.75713e-01 188 2017 9 6.71789e-01 2.53919e-01 309 2017 10 7.36644e-01 2.14176e-01 114 2017 11 1.09726e+00 2.46335e-01 508 2017 12 1.08519e+00 1.59524e-01 980 2018 1 1.25721e+00 2.70231e-01 425 2018 2 1.45025e+00 1.93369e-01 573 2018 3 1.68048e+00 3.92314e-01 778 2018 4 1.69564e+00 1.80183e-01 517 2018 5 1.64237e+00 6.38487e-02 75 2018 6 1.50242e+00 1.03068e-01 246 2018 7 1.33033e+00 2.65018e-01 170 2018 8 6.87055e-01 1.85080e-01 50 2018 9 7.95241e-01 2.51614e-01 225 2018 10 1.37827e+00 5.17717e-01 192 2018 11 1.34407e+00 3.01333e-01 326 2018 12 1.40564e+00 1.83995e-01 512 2019 1 1.41663e+00 2.39999e-01 706 2019 2 1.62690e+00 2.33167e-01 367 2019 3 1.52339e+00 3.92985e-01 437 2019 4 1.78862e+00 3.47557e-01 352 2019 5 1.87905e+00 3.48440e-01 298 2019 6 1.58615e+00 2.52241e-01 303 2019 7 1.59523e+00 2.31275e-01 332 2019 8 1.50364e+00 7.72869e-01 190 2019 9 1.42539e+00 1.70632e-01 349 2019 10 1.48025e+00 1.94024e-01 386 2019 11 1.20287e+00 1.50404e-01 482 2019 12 1.16418e+00 1.49764e-01 475 2020 1 1.40263e+00 2.58426e-01 700 2020 2 1.68973e+00 4.21608e-01 367 2020 3 1.65782e+00 3.12843e-01 367 2020 4 1.66389e+00 2.85639e-01 242 2020 5 1.79692e+00 2.14013e-01 321 2020 6 1.83577e+00 1.94626e-01 252 2020 7 1.61725e+00 7.26346e-02 64 2020 8 1.46526e+00 1.57727e-01 217 2020 9 8.99648e-01 3.68952e-01 168 2020 10 1.27181e+00 2.48495e-01 65 2020 11 9.69842e-01 2.67352e-01 218 2020 12 1.19836e+00 2.25391e-01 443 2021 1 1.49346e+00 3.98722e-01 579 2021 2 1.56600e+00 3.53397e-01 658 2021 3 1.77548e+00 1.76213e-01 405 2021 4 1.76943e+00 2.02586e-01 404 2021 5 1.66998e+00 2.87337e-01 242 2021 6 1.76975e+00 6.17728e-02 118 2021 7 1.59487e+00 8.90022e-02 124 2021 8 1.47111e+00 1.08408e-01 68 2021 9 1.02845e+00 3.51639e-01 141 2021 10 1.05418e+00 2.35325e-01 526 2021 11 1.54072e+00 2.56033e-01 519 2021 12 1.40557e+00 2.88302e-01 779 2022 1 1.20862e+00 1.43531e-01 666 2022 2 1.44009e+00 3.26240e-01 552 2022 3 1.61816e+00 2.61650e-01 738 2022 4 1.76447e+00 7.89940e-02 62 2022 5 1.76912e+00 2.69154e-01 409 2022 6 2.05668e+00 2.17453e-01 172 2022 7 1.59917e+00 1.95131e-01 175 2022 8 1.41941e+00 1.26480e-01 262 2022 9 1.06952e+00 3.45327e-01 259 2022 10 7.71451e-01 2.57325e-01 516 2022 11 1.09089e+00 1.38333e-01 514 2022 12 1.09975e+00 1.50461e-01 613 2023 1 1.18403e+00 2.79200e-01 895 2023 2 1.21251e+00 1.60478e-01 1084 2023 3 1.31358e+00 1.84856e-01 883 2023 4 1.35534e+00 1.32753e-01 390 2023 5 1.72804e+00 2.10144e-01 598 2023 6 1.44555e+00 2.76796e-01 188 2023 7 1.39365e+00 7.10313e-02 192 2023 8 1.67425e+00 7.19500e-01 184 2023 9 1.32901e+00 2.65472e-01 428 2023 10 1.27579e+00 2.91077e-01 467 2023 11 1.39657e+00 3.17873e-01 722 2023 12 1.46553e+00 5.05336e-01 392 2024 1 1.45629e+00 3.15580e-01 107 2024 2 1.68201e+00 4.04672e-01 799 2024 3 1.16665e+00 2.44273e-01 503 2024 4 nan nan 0