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 1.72255e+01 5.21775e+00 52 2002 8 1.14247e+01 3.90413e+00 64 2002 9 4.69510e+00 4.03462e+00 192 2002 10 5.53996e+00 4.66924e+00 550 2002 11 7.08891e+00 6.34753e+00 676 2002 12 7.34478e+00 5.73633e+00 505 2003 1 1.03434e+01 6.93586e+00 625 2003 2 5.64344e+00 6.19924e+00 542 2003 3 7.78499e+00 4.33536e+00 377 2003 4 3.28895e+00 2.73385e+00 99 2003 5 9.67742e+00 3.85450e+00 146 2003 6 3.16658e+00 1.55135e+00 64 2003 7 nan nan 0 2003 8 3.71903e+00 1.48723e+00 123 2003 9 6.26774e+00 2.51210e+00 131 2003 10 6.57993e+00 4.28433e+00 294 2003 11 4.68880e-01 5.69729e-01 355 2003 12 5.37273e+00 7.13502e+00 416 2004 1 1.52435e+00 1.52611e+00 416 2004 2 6.91674e+00 6.00158e+00 512 2004 3 8.70844e+00 7.61572e+00 636 2004 4 8.53687e+00 6.45880e+00 463 2004 5 5.72841e+00 6.05866e+00 111 2004 6 1.23557e+01 4.73600e+00 64 2004 7 1.36825e+01 4.46148e+00 54 2004 8 1.98881e+01 4.85232e+00 37 2004 9 7.18761e+00 2.94815e+00 64 2004 10 2.02973e+00 2.29926e+00 383 2004 11 1.46111e+00 2.38820e+00 363 2004 12 1.49685e+00 2.03083e+00 783 2005 1 8.08946e-01 1.71729e+00 371 2005 2 6.29712e+00 9.49235e+00 368 2005 3 1.01516e+01 6.61470e+00 354 2005 4 1.17260e+01 5.17009e+00 97 2005 5 6.37879e+00 7.02361e+00 92 2005 6 nan nan 0 2005 7 6.45645e+00 2.74663e+00 63 2005 8 9.31491e+00 1.98389e+00 48 2005 9 9.95477e-01 3.06176e-01 31 2005 10 5.32154e+00 2.71266e+00 260 2005 11 2.50857e+00 3.27719e+00 364 2005 12 5.06511e+00 3.72029e+00 732 2006 1 1.73089e+00 2.57308e+00 275 2006 2 8.61177e+00 7.92397e+00 630 2006 3 7.06481e+00 5.46645e+00 344 2006 4 nan nan 0 2006 5 1.21248e+01 1.33316e+00 2 2006 6 1.21231e+01 2.87572e+00 56 2006 7 1.06845e+01 7.68998e+00 141 2006 8 7.68280e+00 1.58406e+00 62 2006 9 4.82874e+00 5.11922e+00 344 2006 10 9.22225e+00 4.91463e+00 191 2006 11 5.22267e+00 3.75171e+00 638 2006 12 3.70791e+00 3.25982e+00 398 2007 1 7.92024e+00 5.59842e+00 513 2007 2 8.88201e+00 6.51332e+00 738 2007 3 5.85829e+00 3.28912e+00 103 2007 4 9.75221e+00 6.22502e+00 123 2007 5 4.99263e+00 8.83477e-01 29 2007 6 1.05852e+01 6.60128e+00 119 2007 7 9.16222e+00 1.98808e+00 64 2007 8 8.00134e+00 4.54348e+00 203 2007 9 6.22524e+00 2.09205e+00 197 2007 10 4.46105e+00 2.63690e+00 284 2007 11 1.96027e+00 2.43992e+00 336 2007 12 1.37358e+00 2.27337e+00 434 2008 1 4.00683e+00 4.70507e+00 712 2008 2 7.67611e+00 4.95023e+00 533 2008 3 7.88179e+00 6.25091e+00 436 2008 4 7.74478e+00 4.44506e+00 141 2008 5 7.72242e+00 7.78848e-01 29 2008 6 nan nan 0 2008 7 1.18991e+01 5.18035e+00 115 2008 8 1.06015e+01 5.11815e+00 162 2008 9 5.11721e+00 2.37479e+00 128 2008 10 4.28899e+00 3.00648e+00 660 2008 11 6.66181e+00 4.54417e+00 454 2008 12 5.12190e+00 3.87873e+00 573 2009 1 5.51071e+00 3.33960e+00 551 2009 2 8.66622e+00 5.01095e+00 311 2009 3 2.26438e+00 2.37997e+00 289 2009 4 1.06616e+01 4.06206e+00 293 2009 5 7.69148e+00 5.64155e+00 128 2009 6 9.13738e+00 4.84596e+00 124 2009 7 1.03729e+01 4.10460e+00 342 2009 8 1.74229e+01 8.06624e+00 58 2009 9 9.97562e+00 3.38860e+00 97 2009 10 7.72080e+00 5.05687e+00 597 2009 11 2.82023e+00 3.45023e+00 520 2009 12 5.59668e+00 5.26067e+00 675 2010 1 2.26535e+00 2.72243e+00 611 2010 2 4.03039e+00 3.48802e+00 396 2010 3 1.10174e+01 4.97034e+00 296 2010 4 8.24782e+00 4.44773e+00 180 2010 5 5.99661e+00 1.30611e+00 80 2010 6 1.09987e+01 4.20269e+00 217 2010 7 1.38016e+00 4.77062e-01 40 2010 8 5.80589e+00 2.98589e+00 84 2010 9 3.49279e+00 2.11019e+00 160 2010 10 3.65617e+00 2.61233e+00 373 2010 11 3.24640e+00 2.60875e+00 197 2010 12 4.72650e+00 6.57702e+00 416 2011 1 4.35271e+00 3.08972e+00 553 2011 2 7.61218e+00 5.08521e+00 470 2011 3 6.20950e+00 3.92796e+00 531 2011 4 1.00521e+01 5.94593e+00 367 2011 5 4.11455e+00 2.43825e+00 87 2011 6 3.64743e+00 8.74048e-01 57 2011 7 nan nan 0 2011 8 6.83480e+00 5.54866e+00 111 2011 9 3.25456e+00 1.92337e+00 282 2011 10 2.53034e+00 2.83798e+00 455 2011 11 5.20693e-01 9.42995e-01 334 2011 12 2.01863e+00 2.96477e+00 325 2012 1 3.66720e+00 4.03715e+00 742 2012 2 2.97151e+00 5.09294e+00 669 2012 3 9.21540e+00 6.87040e+00 244 2012 4 9.88465e-01 6.25982e-01 82 2012 5 4.71329e+00 1.19031e+00 124 2012 6 1.06974e+01 3.97624e+00 64 2012 7 1.28885e+01 3.74451e+00 63 2012 8 8.19082e+00 3.79136e+00 64 2012 9 3.95121e+00 2.32808e+00 238 2012 10 5.60257e+00 3.75879e+00 138 2012 11 2.25475e+00 2.31916e+00 498 2012 12 3.67578e+00 2.05014e+00 394 2013 1 5.04391e+00 3.55276e+00 515 2013 2 5.78640e+00 3.95720e+00 595 2013 3 3.67530e+00 3.32719e+00 380 2013 4 1.05860e+01 7.05990e+00 334 2013 5 8.35050e+00 1.79124e+00 57 2013 6 nan nan 0 2013 7 5.45308e+00 3.72827e+00 120 2013 8 8.72833e+00 4.11634e+00 192 2013 9 1.80362e+00 2.16955e-01 8 2013 10 9.68320e+00 3.66351e+00 192 2013 11 1.45397e+00 2.18609e+00 425 2013 12 3.59827e+00 2.84801e+00 600 2014 1 9.69149e+00 6.78406e+00 586 2014 2 3.57529e+00 2.94027e+00 469 2014 3 9.53940e+00 7.19114e+00 588 2014 4 9.13466e+00 5.04345e+00 290 2014 5 7.92967e+00 2.46553e+00 64 2014 6 8.87923e+00 3.77847e+00 64 2014 7 1.00976e+01 4.19339e+00 117 2014 8 1.31905e+01 7.58980e+00 124 2014 9 6.27162e+00 3.50062e+00 290 2014 10 6.68336e+00 5.80815e+00 410 2014 11 4.53675e+00 3.74609e+00 568 2014 12 4.09398e+00 3.40343e+00 579 2015 1 7.27818e+00 5.52104e+00 607 2015 2 4.79753e+00 4.35462e+00 602 2015 3 5.16752e+00 4.24987e+00 483 2015 4 1.48393e+01 7.06124e+00 375 2015 5 1.81356e+01 3.89628e+00 119 2015 6 1.48967e+01 3.96258e+00 56 2015 7 1.56287e+01 1.38897e-01 8 2015 8 1.10068e+01 5.29688e+00 380 2015 9 9.69669e+00 4.97278e+00 251 2015 10 6.75485e+00 3.99235e+00 338 2015 11 6.63247e+00 3.25859e+00 378 2015 12 2.42807e+00 2.32540e+00 509 2016 1 3.79108e+00 5.39049e+00 453 2016 2 7.04175e+00 6.06593e+00 694 2016 3 3.56509e+00 2.43582e+00 285 2016 4 6.42797e+00 3.25510e+00 243 2016 5 1.34995e+01 2.49469e+00 52 2016 6 1.40609e+01 3.58523e+00 110 2016 7 9.40572e+00 2.92757e+00 113 2016 8 1.20464e+01 3.65216e+00 139 2016 9 9.37955e+00 4.35030e+00 297 2016 10 4.23759e-01 4.29991e-01 128 2016 11 4.10831e+00 2.77987e+00 64 2016 12 5.68575e+00 4.42366e+00 426 2017 1 2.38622e+00 3.39222e+00 467 2017 2 6.82704e+00 4.09378e+00 609 2017 3 6.23472e+00 3.44908e+00 242 2017 4 5.16520e+00 2.73690e+00 291 2017 5 1.00483e+01 3.78219e+00 176 2017 6 1.12296e+01 3.55241e+00 300 2017 7 8.40388e+00 4.39470e+00 238 2017 8 8.31348e+00 3.86050e+00 65 2017 9 2.14329e+00 1.97805e+00 249 2017 10 3.86588e+00 5.28275e+00 250 2017 11 3.26090e+00 3.80887e+00 461 2017 12 4.98414e+00 4.82570e+00 491 2018 1 1.35385e+00 1.22359e+00 281 2018 2 1.77831e+00 2.93023e+00 404 2018 3 3.66536e+00 3.49124e+00 255 2018 4 1.17153e+01 4.27795e+00 235 2018 5 1.08980e+01 3.92989e+00 125 2018 6 1.44801e+01 6.24142e+00 198 2018 7 1.10938e+01 2.74379e+00 56 2018 8 9.59913e+00 5.92241e+00 188 2018 9 5.36574e+00 2.72356e+00 245 2018 10 7.17034e+00 4.53598e+00 590 2018 11 4.44126e+00 3.86416e+00 795 2018 12 5.45182e+00 4.10140e+00 487 2019 1 9.84446e+00 5.42658e+00 718 2019 2 9.35013e+00 5.90762e+00 485 2019 3 9.72410e+00 5.31082e+00 539 2019 4 1.43291e+01 7.99301e+00 383 2019 5 3.82558e+00 7.70386e-01 36 2019 6 9.57167e+00 1.57291e+00 64 2019 7 1.62654e+01 9.57215e-01 5 2019 8 1.15760e+01 7.48417e+00 183 2019 9 7.34049e+00 2.51154e+00 64 2019 10 1.00918e+01 5.21504e+00 410 2019 11 6.01189e+00 4.60073e+00 817 2019 12 2.80501e+00 3.85235e+00 581 2020 1 3.00235e+00 3.37306e+00 476 2020 2 7.77304e+00 5.43013e+00 620 2020 3 3.62949e+00 2.75742e+00 356 2020 4 8.19659e+00 6.20430e+00 361 2020 5 1.38226e+01 3.68254e+00 103 2020 6 1.06456e+01 5.17380e+00 274 2020 7 8.48399e+00 5.08314e+00 221 2020 8 9.90454e+00 4.34635e+00 119 2020 9 8.96568e+00 1.00854e+01 128 2020 10 8.68283e+00 4.71503e+00 277 2020 11 3.84810e+00 3.48881e+00 518 2020 12 3.03907e+00 3.86640e+00 618 2021 1 6.83134e+00 4.08119e+00 831 2021 2 5.40198e+00 4.65980e+00 585 2021 3 3.43200e+00 4.09876e+00 295 2021 4 1.57799e+01 6.78797e+00 270 2021 5 9.45074e+00 4.53133e+00 199 2021 6 nan nan 0 2021 7 7.83107e+00 3.36160e+00 212 2021 8 6.25999e+00 1.22230e+00 61 2021 9 7.84460e+00 4.44962e+00 307 2021 10 8.62610e+00 5.89885e+00 326 2021 11 6.06549e+00 4.38660e+00 808 2021 12 6.08810e+00 4.21156e+00 441 2022 1 9.47528e+00 5.55662e+00 1034 2022 2 2.53492e+00 2.76386e+00 581 2022 3 5.49651e+00 5.53603e+00 413 2022 4 9.60491e+00 3.46833e+00 113 2022 5 7.90118e+00 5.88489e+00 193 2022 6 1.37127e+01 6.43234e+00 206 2022 7 2.01376e+01 6.48326e+00 128 2022 8 1.50179e+01 1.00446e+01 227 2022 9 5.62999e+00 4.52304e+00 224 2022 10 4.53720e+00 2.96188e+00 416 2022 11 3.85507e+00 3.36542e+00 699 2022 12 1.86539e+00 2.31965e+00 864 2023 1 7.48820e+00 4.00181e+00 891 2023 2 6.29986e+00 6.15871e+00 455 2023 3 1.27276e+01 7.69958e+00 536 2023 4 8.13390e+00 5.10144e+00 312 2023 5 5.21458e+00 2.01992e+00 58 2023 6 8.84243e+00 3.68069e+00 108 2023 7 nan nan 0 2023 8 1.50089e+01 7.38207e+00 205 2023 9 5.27304e+00 5.30220e+00 181 2023 10 9.44194e+00 7.70854e+00 277 2023 11 6.65680e+00 5.31288e+00 669 2023 12 5.30165e+00 5.25029e+00 549 2024 1 9.01909e+00 5.99969e+00 811 2024 2 3.65687e+00 4.93061e+00 386 2024 3 8.96723e+00 6.43329e+00 403 2024 4 8.70155e+00 5.72470e+00 233 2024 5 3.48757e+00 5.89604e-01 62 2024 6 7.86492e+00 4.50691e+00 64 2024 7 9.18252e+00 3.79869e+00 97 2024 8 9.57895e+00 7.24718e+00 153 2024 9 9.65744e-01 1.27911e+00 78