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 2.52013e+00 1.61536e-01 64 2002 8 7.89629e+00 8.10272e+00 95 2002 9 1.74268e+00 3.38337e-01 33 2002 10 2.90453e+00 6.46917e-01 421 2002 11 2.48839e+00 7.60796e-01 556 2002 12 2.18075e+00 7.22366e-01 633 2003 1 2.45786e+00 9.83402e-01 979 2003 2 3.68251e+00 6.17392e-01 510 2003 3 2.55388e+00 1.27561e+00 234 2003 4 3.24705e+00 9.68204e-01 342 2003 5 2.84795e+00 9.28015e-01 406 2003 6 2.93161e+00 4.17165e-01 88 2003 7 5.82022e+00 8.70936e-02 29 2003 8 3.52649e+00 4.30380e+00 86 2003 9 2.74818e+00 1.73937e+00 192 2003 10 2.99117e+00 1.15186e+00 540 2003 11 2.53022e+00 1.03777e+00 671 2003 12 2.10045e+00 8.31611e-01 553 2004 1 2.85575e+00 6.90909e-01 724 2004 2 2.79562e+00 6.88005e-01 564 2004 3 4.18203e+00 7.86844e-01 596 2004 4 4.90521e+00 8.10499e-01 254 2004 5 4.73530e+00 4.62957e-01 399 2004 6 4.65115e+00 1.02160e+00 405 2004 7 3.36750e+00 4.23910e-01 160 2004 8 1.53060e+00 7.00005e-01 215 2004 9 1.90252e+00 6.12520e-01 165 2004 10 2.39123e+00 4.06227e-01 326 2004 11 2.69850e+00 6.89151e-01 702 2004 12 1.26041e+00 7.52203e-01 376 2005 1 2.18871e+00 1.10836e+00 578 2005 2 1.51967e+00 4.78552e-01 435 2005 3 1.76580e+00 4.54221e-01 239 2005 4 3.10411e+00 3.69449e-01 282 2005 5 3.65995e+00 4.95789e-01 236 2005 6 2.86093e+00 1.08737e+00 195 2005 7 2.64011e+00 1.10997e+00 214 2005 8 2.70460e+00 8.90349e-01 193 2005 9 2.09632e+00 2.61987e-01 128 2005 10 2.26845e+00 7.61337e-01 404 2005 11 1.84647e+00 9.17319e-01 375 2005 12 1.69287e+00 4.49833e-01 679 2006 1 1.66610e+00 5.87542e-01 316 2006 2 2.87586e+00 1.23531e+00 563 2006 3 4.19759e+00 6.71866e-01 796 2006 4 5.33805e+00 7.30844e-01 374 2006 5 5.09313e+00 4.60726e-01 399 2006 6 4.47056e+00 5.37987e-01 361 2006 7 3.83813e+00 9.96086e-01 158 2006 8 1.60068e+00 6.74482e-01 97 2006 9 1.36493e+00 1.17890e+00 145 2006 10 1.95811e+00 6.62049e-01 403 2006 11 2.06852e+00 6.93262e-01 442 2006 12 3.00595e+00 1.32933e+00 190 2007 1 2.96486e+00 8.16120e-01 547 2007 2 3.69175e+00 9.23344e-01 604 2007 3 4.14301e+00 1.03421e+00 431 2007 4 4.97702e+00 6.17472e-01 272 2007 5 4.77380e+00 4.57329e-01 262 2007 6 4.67795e+00 3.15280e-01 103 2007 7 4.55680e+00 3.13828e-01 282 2007 8 3.35918e+00 3.60291e-01 188 2007 9 2.61133e+00 1.12425e+00 343 2007 10 5.40450e+00 8.43751e-01 195 2007 11 3.21070e+00 1.41283e+00 678 2007 12 3.48244e+00 1.26634e+00 629 2008 1 4.03407e+00 1.18724e+00 513 2008 2 4.79039e+00 1.24962e+00 634 2008 3 2.78874e+00 6.53079e-01 301 2008 4 4.79907e+00 5.56387e-01 445 2008 5 4.39596e+00 5.82492e-01 346 2008 6 4.47871e+00 6.77237e-01 405 2008 7 4.09519e+00 8.44196e-01 98 2008 8 3.64521e+00 3.89545e-01 236 2008 9 2.67254e+00 8.35294e-01 175 2008 10 3.27375e+00 1.05278e+00 574 2008 11 2.88956e+00 7.98863e-01 773 2008 12 2.62213e+00 8.89512e-01 1108 2009 1 2.74545e+00 8.32505e-01 752 2009 2 3.22587e+00 1.25833e+00 555 2009 3 4.12065e+00 5.30753e-01 599 2009 4 3.95743e+00 8.47284e-01 192 2009 5 4.33673e+00 4.87805e-01 316 2009 6 3.75985e+00 4.40357e-01 158 2009 7 2.98752e+00 8.07452e-01 343 2009 8 2.79927e+00 1.31033e+00 158 2009 9 3.23804e+00 1.72851e+00 244 2009 10 3.32764e+00 2.76008e+00 663 2009 11 2.71846e+00 4.60238e-01 434 2009 12 3.11560e+00 9.36647e-01 299 2010 1 1.65346e+00 4.47349e-01 441 2010 2 1.56731e+00 4.08457e-01 381 2010 3 2.92405e+00 8.44786e-01 291 2010 4 3.97449e+00 4.64290e-01 206 2010 5 4.25599e+00 9.94620e-01 437 2010 6 4.53171e+00 4.90971e-01 245 2010 7 4.09410e+00 9.65598e-01 232 2010 8 3.37102e+00 6.41167e-01 240 2010 9 3.37198e+00 8.48368e-01 153 2010 10 3.77648e+00 5.48128e-01 883 2010 11 3.38982e+00 7.56153e-01 764 2010 12 2.20213e+00 8.42746e-01 610 2011 1 2.66806e+00 1.11915e+00 605 2011 2 3.93069e+00 9.74254e-01 746 2011 3 5.07881e+00 8.14551e-01 537 2011 4 4.41284e+00 8.46029e-01 540 2011 5 4.37764e+00 7.25045e-01 374 2011 6 4.32851e+00 4.68496e-01 216 2011 7 3.97365e+00 5.37092e-01 74 2011 8 3.78998e+00 3.31665e-01 100 2011 9 2.56584e+00 9.86961e-01 291 2011 10 2.65192e+00 7.73902e-01 564 2011 11 3.10619e+00 9.67805e-01 536 2011 12 2.98176e+00 1.26328e+00 730 2012 1 3.16331e+00 1.27703e+00 745 2012 2 4.02751e+00 1.22776e+00 513 2012 3 4.65817e+00 8.96779e-01 285 2012 4 4.92042e+00 5.47367e-01 402 2012 5 4.51423e+00 4.93568e-01 469 2012 6 nan nan 0 2012 7 2.69164e+00 3.36494e-01 128 2012 8 3.00741e+00 2.60706e-01 177 2012 9 3.58082e+00 2.75319e+00 193 2012 10 2.26557e+00 8.33314e-01 476 2012 11 2.68327e+00 7.24926e-01 558 2012 12 2.72592e+00 7.55091e-01 329 2013 1 2.36316e+00 4.57643e-01 549 2013 2 2.89292e+00 9.62774e-01 733 2013 3 2.70442e+00 6.31078e-01 515 2013 4 4.36908e+00 1.08455e+00 245 2013 5 4.37425e+00 6.43830e-01 440 2013 6 3.89225e+00 6.05538e-01 379 2013 7 2.28630e+00 1.33161e+00 112 2013 8 1.94281e+00 8.32871e-01 72 2013 9 3.65452e+00 2.28454e+00 271 2013 10 3.26806e+00 1.18096e+00 390 2013 11 2.27176e+00 7.34047e-01 183 2013 12 3.52753e+00 5.72279e-01 658 2014 1 2.68249e+00 1.35305e+00 548 2014 2 3.06237e+00 8.09460e-01 655 2014 3 2.99229e+00 8.90984e-01 478 2014 4 4.09672e+00 7.58720e-01 278 2014 5 4.47503e+00 5.08116e-01 287 2014 6 4.71192e+00 3.14821e-01 111 2014 7 3.62125e+00 3.56014e-01 207 2014 8 3.73295e+00 6.58950e-01 151 2014 9 nan nan 0 2014 10 2.28469e+00 6.73848e-01 701 2014 11 2.45704e+00 1.05462e+00 602 2014 12 3.08756e+00 1.11645e+00 717 2015 1 2.89520e+00 1.27653e+00 511 2015 2 2.12704e+00 8.35910e-01 542 2015 3 4.04499e+00 6.85806e-01 622 2015 4 5.06126e+00 1.05013e+00 233 2015 5 4.71303e+00 4.42908e-01 429 2015 6 4.49844e+00 6.28706e-01 313 2015 7 3.97602e+00 2.02035e-01 192 2015 8 2.44997e+00 9.99891e-01 177 2015 9 2.64648e+00 1.22931e+00 261 2015 10 1.94233e+00 6.74082e-01 334 2015 11 2.43435e+00 1.19030e+00 392 2015 12 2.57140e+00 7.25405e-01 359 2016 1 1.96566e+00 6.90567e-01 291 2016 2 2.75938e+00 1.38904e+00 298 2016 3 2.95930e+00 3.95048e-01 295 2016 4 3.57534e+00 9.21505e-01 417 2016 5 4.20601e+00 1.17615e+00 366 2016 6 4.42471e+00 1.07795e+00 430 2016 7 3.32917e+00 9.04348e-01 363 2016 8 2.13227e+00 7.39085e-01 209 2016 9 2.97033e+00 1.67475e+00 514 2016 10 2.34622e+00 2.38417e+00 361 2016 11 2.80865e+00 6.03806e-01 566 2016 12 3.29455e+00 7.67500e-01 668 2017 1 3.21072e+00 1.16198e+00 436 2017 2 3.27491e+00 6.97456e-01 899 2017 3 4.17459e+00 7.51142e-01 794 2017 4 3.92229e+00 7.69975e-01 434 2017 5 3.50440e+00 9.42301e-01 373 2017 6 3.11293e+00 1.19334e+00 185 2017 7 3.29005e+00 6.46267e-01 127 2017 8 2.12140e+00 7.64031e-01 267 2017 9 1.35473e+00 9.62090e-01 258 2017 10 2.37933e+00 1.17977e+00 291 2017 11 2.74181e+00 5.82187e-01 671 2017 12 3.05498e+00 1.01742e+00 659 2018 1 2.29781e+00 9.34105e-01 580 2018 2 3.23317e+00 6.68746e-01 662 2018 3 2.91645e+00 1.00570e+00 921 2018 4 4.21280e+00 5.42266e-01 641 2018 5 4.45501e+00 4.33094e-01 192 2018 6 3.30286e+00 7.06566e-01 292 2018 7 3.45982e+00 1.83324e+00 347 2018 8 2.15366e+00 9.31432e-01 218 2018 9 6.65302e-01 1.76794e-01 120 2018 10 1.78642e+00 1.27349e+00 329 2018 11 1.63576e+00 4.34340e-01 136 2018 12 2.00536e+00 5.46741e-01 328 2019 1 2.08246e+00 8.52019e-01 425 2019 2 3.69725e+00 7.95158e-01 387 2019 3 3.43074e+00 1.09437e+00 690 2019 4 4.31184e+00 8.91388e-01 254 2019 5 4.58311e+00 5.42550e-01 343 2019 6 4.55566e+00 5.45337e-01 93 2019 7 3.71811e+00 7.01345e-01 342 2019 8 3.57775e+00 1.33265e+00 52 2019 9 3.39940e+00 3.88140e-01 307 2019 10 3.19037e+00 1.14626e+00 418 2019 11 2.90980e+00 5.18419e-01 346 2019 12 2.35918e+00 5.72876e-01 119 2020 1 2.78854e+00 1.11398e+00 624 2020 2 4.28678e+00 8.66182e-01 363 2020 3 3.84861e+00 1.50564e+00 385 2020 4 4.15532e+00 9.95174e-01 256 2020 5 4.84445e+00 5.04378e-01 552 2020 6 3.25731e+00 7.06569e-01 322 2020 7 3.30935e+00 7.18484e-01 130 2020 8 3.56527e+00 3.67549e-01 192 2020 9 3.40626e+00 2.54925e+00 207 2020 10 1.54108e+00 4.61548e-01 180 2020 11 2.19773e+00 8.25392e-01 357 2020 12 2.47302e+00 7.68125e-01 642 2021 1 3.10135e+00 7.89759e-01 624 2021 2 2.51859e+00 7.11048e-01 410 2021 3 4.20420e+00 7.83568e-01 359 2021 4 4.14218e+00 6.40108e-01 597 2021 5 3.18824e+00 5.87048e-01 444 2021 6 4.30624e+00 0.00000e+00 2 2021 7 3.22464e+00 6.80586e-01 293 2021 8 1.73973e+00 1.33884e+00 109 2021 9 2.19152e+00 6.56673e-01 339 2021 10 1.50589e+00 2.03996e+00 198 2021 11 1.93718e+00 7.24117e-01 542 2021 12 2.67437e+00 1.12098e+00 586 2022 1 2.88087e+00 5.89170e-01 351 2022 2 3.14656e+00 7.91834e-01 697 2022 3 4.17796e+00 8.91875e-01 725 2022 4 5.39103e+00 3.69386e-01 49 2022 5 4.88755e+00 6.19429e-01 506 2022 6 4.95351e+00 6.99126e-01 191 2022 7 4.39551e+00 7.30930e-01 368 2022 8 2.75140e+00 1.08093e+00 303 2022 9 2.10179e+00 8.31176e-01 360 2022 10 2.18349e+00 7.86035e-01 530 2022 11 1.61657e+00 5.78835e-01 372 2022 12 3.19557e+00 1.08497e+00 499 2023 1 2.70485e+00 9.40631e-01 947 2023 2 2.42641e+00 1.01086e+00 1059 2023 3 3.38892e+00 1.04270e+00 915 2023 4 4.11348e+00 7.80034e-01 388 2023 5 4.83835e+00 7.15615e-01 511 2023 6 4.86845e+00 7.84712e-01 327 2023 7 3.53393e+00 9.08331e-01 309 2023 8 2.86313e+00 1.71715e+00 233 2023 9 3.01296e+00 5.86585e-01 514 2023 10 3.11065e+00 2.82844e+00 465 2023 11 2.95515e+00 8.26548e-01 616 2023 12 2.51320e+00 1.31601e+00 420 2024 1 2.65518e+00 1.15426e+00 360 2024 2 3.39147e+00 1.00291e+00 770 2024 3 3.10517e+00 1.03369e+00 404 2024 4 4.51403e+00 1.50920e-01 22