YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.71815e+01 1.82782e-01 13 2000 3 1.97177e+01 1.03272e+00 120 2000 4 2.16923e+01 1.83095e+00 70 2000 5 2.50551e+01 1.61590e+00 97 2000 6 2.80293e+01 1.62651e+00 90 2000 7 2.95221e+01 1.41159e+00 138 2000 8 2.78465e+01 5.53762e-01 39 2000 9 2.65271e+01 1.60487e+00 86 2000 10 2.26649e+01 1.56216e+00 111 2000 11 2.09878e+01 3.08697e+00 79 2000 12 1.46600e+01 7.81826e-02 8 2001 1 1.24269e+01 8.51996e-02 16 2001 2 1.67864e+01 2.74853e+00 62 2001 3 1.55583e+01 7.61018e-01 32 2001 4 2.10912e+01 2.25886e+00 102 2001 5 2.48984e+01 2.11884e+00 101 2001 6 2.50745e+01 2.66936e+00 31 2001 7 2.79222e+01 9.12558e-01 54 2001 8 2.79222e+01 1.14215e+00 79 2001 9 2.68558e+01 1.68011e+00 83 2001 10 2.30225e+01 1.56683e+00 106 2001 11 1.98872e+01 7.51514e-01 79 2001 12 1.91087e+01 1.88069e+00 78 2002 1 1.54275e+01 4.33023e-03 4 2002 2 1.37074e+01 4.23601e-01 35 2002 3 1.67551e+01 2.35879e+00 37 2002 4 2.33938e+01 1.71248e+00 82 2002 5 2.48048e+01 1.73943e+00 69 2002 6 2.80406e+01 1.27528e+00 80 2002 7 2.95047e+01 1.39427e+00 403 2002 8 2.87931e+01 1.29894e+00 459 2002 9 2.80328e+01 1.40698e+00 338 2002 10 2.61757e+01 2.14481e+00 432 2002 11 2.07708e+01 2.52797e+00 184 2002 12 1.46458e+01 1.15917e+00 123 2003 1 1.27303e+01 7.75361e-01 87 2003 2 1.44977e+01 1.49595e+00 161 2003 3 2.01926e+01 3.06581e+00 145 2003 4 2.10115e+01 2.30544e+00 391 2003 5 2.61402e+01 1.66084e+00 480 2003 6 2.81588e+01 2.10130e+00 336 2003 7 2.93975e+01 1.86842e+00 434 2003 8 2.81196e+01 1.46680e+00 376 2003 9 2.77065e+01 1.21350e+00 416 2003 10 2.34800e+01 1.35520e+00 367 2003 11 2.11261e+01 2.52073e+00 477 2003 12 1.51230e+01 1.03165e+00 28 2004 1 1.39657e+01 7.85787e-01 56 2004 2 1.29709e+01 1.74145e+00 125 2004 3 1.81335e+01 1.87638e+00 419 2004 4 2.01364e+01 2.09703e+00 388 2004 5 2.60543e+01 2.01638e+00 552 2004 6 2.88095e+01 1.64199e+00 521 2004 7 2.95243e+01 1.85297e+00 517 2004 8 2.96373e+01 1.65950e+00 529 2004 9 2.67563e+01 1.87417e+00 370 2004 10 2.46852e+01 1.80633e+00 553 2004 11 2.07912e+01 2.48789e+00 261 2004 12 1.67914e+01 1.20640e+00 98 2005 1 1.40985e+01 1.83243e+00 165 2005 2 1.50944e+01 1.77048e+00 237 2005 3 1.65027e+01 1.90391e+00 327 2005 4 2.03300e+01 2.41147e+00 379 2005 5 2.49235e+01 3.16040e+00 554 2005 6 2.86516e+01 2.03925e+00 552 2005 7 2.91075e+01 2.10855e+00 531 2005 8 2.97941e+01 1.93184e+00 476 2005 9 2.78849e+01 1.68299e+00 513 2005 10 2.49781e+01 2.06402e+00 464 2005 11 1.95824e+01 2.20130e+00 306 2005 12 1.50800e+01 1.46199e+00 130 2006 1 1.52864e+01 1.64362e+00 282 2006 2 1.41748e+01 1.42863e+00 179 2006 3 1.76754e+01 1.69556e+00 375 2006 4 2.27213e+01 2.39943e+00 418 2006 5 2.57242e+01 2.20965e+00 452 2006 6 2.87232e+01 1.63529e+00 472 2006 7 3.02590e+01 1.69206e+00 474 2006 8 3.02012e+01 1.39675e+00 541 2006 9 2.75565e+01 1.68418e+00 537 2006 10 2.45808e+01 2.52369e+00 375 2006 11 1.84751e+01 2.03378e+00 279 2006 12 1.53890e+01 1.14918e+00 94 2007 1 1.38668e+01 1.23728e+00 73 2007 2 1.40725e+01 2.21264e+00 192 2007 3 1.82758e+01 2.30255e+00 398 2007 4 2.01750e+01 2.19335e+00 375 2007 5 2.44683e+01 1.42475e+00 527 2007 6 2.76185e+01 1.96340e+00 364 2007 7 2.93987e+01 1.32917e+00 374 2007 8 2.98166e+01 1.36072e+00 483 2007 9 2.81061e+01 1.28097e+00 354 2007 10 2.52565e+01 1.88691e+00 347 2007 11 1.85724e+01 1.34448e+00 366 2007 12 1.69638e+01 1.91979e+00 255 2008 1 1.44351e+01 1.41279e+00 93 2008 2 1.62062e+01 1.41689e+00 234 2008 3 1.72073e+01 1.70633e+00 348 2008 4 2.14463e+01 1.83378e+00 341 2008 5 2.50804e+01 2.21426e+00 413 2008 6 2.90528e+01 1.63064e+00 497 2008 7 2.89794e+01 1.51433e+00 465 2008 8 2.80252e+01 1.43059e+00 381 2008 9 2.69752e+01 1.83186e+00 373 2008 10 2.35128e+01 1.71424e+00 451 2008 11 1.81090e+01 1.69347e+00 265 2008 12 1.64153e+01 1.44636e+00 144 2009 1 1.56872e+01 2.01310e+00 174 2009 2 1.41129e+01 1.57005e+00 204 2009 3 1.83809e+01 2.24738e+00 351 2009 4 2.14244e+01 2.65779e+00 416 2009 5 2.55910e+01 2.42696e+00 393 2009 6 2.95498e+01 1.97727e+00 641 2009 7 2.85839e+01 1.95633e+00 460 2009 8 2.92558e+01 1.65163e+00 389 2009 9 2.78263e+01 1.32844e+00 435 2009 10 2.53172e+01 3.15072e+00 419 2009 11 1.89128e+01 1.35804e+00 150 2009 12 1.36560e+01 1.63037e+00 93 2010 1 1.34413e+01 1.61661e+00 88 2010 2 1.14050e+01 1.70294e+00 205 2010 3 1.49535e+01 1.98718e+00 249 2010 4 2.09217e+01 2.06608e+00 452 2010 5 2.71194e+01 2.43688e+00 574 2010 6 3.03770e+01 1.63472e+00 651 2010 7 2.97847e+01 1.77960e+00 574 2010 8 2.94385e+01 1.88785e+00 370 2010 9 2.89363e+01 2.02938e+00 604 2010 10 2.35473e+01 1.44165e+00 536 2010 11 1.89763e+01 1.52427e+00 413 2010 12 1.39959e+01 2.50367e+00 223 2011 1 1.13637e+01 8.54683e-01 184 2011 2 1.57335e+01 3.71321e+00 168 2011 3 1.90520e+01 2.48888e+00 349 2011 4 2.30905e+01 1.99614e+00 419 2011 5 2.53439e+01 1.98719e+00 516 2011 6 3.00176e+01 1.37005e+00 493 2011 7 2.98793e+01 1.43292e+00 388 2011 8 3.04500e+01 1.52941e+00 580 2011 9 2.72720e+01 1.16886e+00 501 2011 10 2.29324e+01 2.07862e+00 488 2011 11 1.84284e+01 8.81184e-01 277 2011 12 1.55512e+01 7.97560e-01 235 2012 1 1.47567e+01 1.74110e+00 264 2012 2 1.46510e+01 1.84877e+00 102 2012 3 2.11607e+01 2.75662e+00 304 2012 4 2.27477e+01 1.40395e+00 458 2012 5 2.67415e+01 1.49992e+00 623 2012 6 2.69454e+01 1.60962e+00 328 2012 7 2.87200e+01 1.72803e+00 480 2012 8 2.86346e+01 1.72621e+00 340 2012 9 2.68077e+01 1.56937e+00 427 2012 10 2.43388e+01 2.14175e+00 543 2012 11 1.80541e+01 1.55386e+00 330 2012 12 1.62137e+01 1.23676e+00 221 2013 1 1.61920e+01 1.63172e+00 207 2013 2 1.62034e+01 1.25669e+00 138 2013 3 1.59883e+01 1.65699e+00 382 2013 4 2.07657e+01 2.24570e+00 317 2013 5 2.47617e+01 2.93365e+00 410 2013 6 2.85186e+01 1.69132e+00 437 2013 7 2.73273e+01 1.72814e+00 235 2013 8 2.90567e+01 2.01360e+00 423 2013 9 2.87958e+01 2.03895e+00 486 2013 10 2.41692e+01 1.72487e+00 425 2013 11 2.02401e+01 2.09056e+00 210 2013 12 1.69858e+01 2.69663e+00 154 2014 1 1.22722e+01 8.52099e-01 152 2014 2 1.32972e+01 2.14818e+00 152 2014 3 1.72455e+01 1.52490e+00 295 2014 4 1.98417e+01 2.82339e+00 284 2014 5 2.51508e+01 2.50102e+00 402 2014 6 2.88538e+01 1.98736e+00 455 2014 7 2.89490e+01 1.62307e+00 584 2014 8 2.93368e+01 1.55974e+00 494 2014 9 2.88279e+01 1.71643e+00 390 2014 10 2.46806e+01 2.35190e+00 572 2014 11 1.74181e+01 2.31213e+00 199 2014 12 1.75736e+01 1.87315e+00 191 2015 1 1.40340e+01 1.43479e+00 153 2015 2 1.35432e+01 1.37207e+00 274 2015 3 1.87197e+01 2.36022e+00 302 2015 4 2.26921e+01 1.89939e+00 180 2015 5 2.67162e+01 2.50347e+00 522 2015 6 3.00554e+01 1.91053e+00 471 2015 7 2.92629e+01 2.09892e+00 469 2015 8 2.98360e+01 1.73971e+00 556 2015 9 2.77148e+01 1.77462e+00 280 2015 10 2.36514e+01 1.34899e+00 406 2015 11 2.13008e+01 2.84162e+00 394 2015 12 1.80265e+01 2.28282e+00 181 2016 1 1.36027e+01 1.17653e+00 191 2016 2 1.42333e+01 1.40637e+00 263 2016 3 1.84076e+01 1.83627e+00 254 2016 4 2.16139e+01 1.93752e+00 367 2016 5 2.52494e+01 1.92690e+00 462 2016 6 2.91762e+01 2.15449e+00 621 2016 7 3.08321e+01 1.34732e+00 610 2016 8 3.00466e+01 1.76277e+00 510 2016 9 2.86261e+01 1.68238e+00 510 2016 10 2.53019e+01 1.45604e+00 513 2016 11 2.05703e+01 2.24684e+00 318 2016 12 1.79150e+01 1.80715e+00 230 2017 1 1.55748e+01 1.60501e+00 186 2017 2 1.79884e+01 1.80522e+00 435 2017 3 1.83424e+01 2.34013e+00 349 2017 4 2.30559e+01 1.72570e+00 495 2017 5 2.44275e+01 2.00181e+00 319 2017 6 2.77651e+01 2.01488e+00 286 2017 7 3.02708e+01 2.18103e+00 524 2017 8 2.95893e+01 1.65603e+00 490 2017 9 2.78095e+01 1.85595e+00 453 2017 10 2.47861e+01 2.12567e+00 503 2017 11 2.00328e+01 1.91765e+00 486 2017 12 1.60660e+01 1.94178e+00 121 2018 1 1.15350e+01 1.57480e+00 128 2018 2 1.96725e+01 2.89032e+00 369 2018 3 1.81802e+01 1.70556e+00 356 2018 4 2.10408e+01 1.14377e+00 479 2018 5 2.59384e+01 2.03496e+00 472 2018 6 2.98479e+01 1.87253e+00 414 2018 7 3.00559e+01 1.53390e+00 445 2018 8 2.88710e+01 1.66290e+00 435 2018 9 2.93222e+01 1.91598e+00 543 2018 10 2.58848e+01 2.42769e+00 464 2018 11 2.03585e+01 3.00170e+00 89 2018 12 1.57040e+01 2.19079e+00 130 2019 1 1.47995e+01 1.48245e+00 236 2019 2 1.78314e+01 1.75420e+00 162 2019 3 1.73493e+01 2.04843e+00 253 2019 4 2.12400e+01 2.03948e+00 400 2019 5 2.75889e+01 2.50479e+00 525 2019 6 2.96030e+01 2.17877e+00 309 2019 7 2.97675e+01 1.52018e+00 440 2019 8 3.03704e+01 1.71169e+00 398 2019 9 2.96358e+01 1.85984e+00 578 2019 10 2.78533e+01 2.15844e+00 460 2019 11 1.89115e+01 1.90512e+00 312 2019 12 1.61292e+01 1.90845e+00 278 2020 1 1.57014e+01 1.96116e+00 369 2020 2 1.57142e+01 1.55726e+00 319 2020 3 2.26947e+01 3.79773e+00 427 2020 4 2.35767e+01 1.65787e+00 324 2020 5 2.50466e+01 2.03396e+00 496 2020 6 2.91326e+01 1.79655e+00 470 2020 7 2.92546e+01 8.61845e-01 376 2020 8 3.10637e+01 1.68432e+00 415 2020 9 2.84479e+01 2.15619e+00 382 2020 10 2.49066e+01 1.67907e+00 451 2020 11 2.11432e+01 1.92245e+00 569 2020 12 1.52175e+01 1.21783e+00 233 2021 1 1.54062e+01 1.45639e+00 222 2021 2 1.56923e+01 2.65133e+00 210 2021 3 1.87542e+01 2.42101e+00 334 2021 4 2.10869e+01 2.10603e+00 352 2021 5 2.57230e+01 2.39124e+00 469 2021 6 2.84086e+01 1.73006e+00 265 2021 7 3.02334e+01 2.29375e+00 444 2021 8 3.00156e+01 1.98103e+00 415 2021 9 2.75057e+01 2.24775e+00 489 2021 10 2.53826e+01 1.94601e+00 501 2021 11 1.90561e+01 1.91024e+00 500 2021 12 1.77125e+01 1.47336e+00 331 2022 1 1.48027e+01 3.11067e+00 373 2022 2 1.68502e+01 2.85118e+00 244 2022 3 1.91440e+01 2.02662e+00 482 2022 4 2.25744e+01 1.69565e+00 219 2022 5 2.65980e+01 1.99546e+00 599 2022 6 2.98808e+01 2.12827e+00 629 2022 7 3.02190e+01 1.79839e+00 532 2022 8 3.06225e+01 1.86176e+00 491 2022 9 2.82812e+01 2.28150e+00 479 2022 10 2.35847e+01 2.41451e+00 600 2022 11 2.10815e+01 2.63267e+00 340 2022 12 1.85327e+01 2.56906e+00 388 2023 1 1.59326e+01 1.80453e+00 474 2023 2 1.84937e+01 2.84690e+00 399 2023 3 2.04482e+01 2.16390e+00 342 2023 4 2.27806e+01 1.78357e+00 405 2023 5 2.45228e+01 2.27295e+00 352 2023 6 2.92492e+01 2.43271e+00 412 2023 7 3.12998e+01 1.51750e+00 603 2023 8 3.11934e+01 1.28475e+00 565 2023 9 2.94714e+01 1.83048e+00 577 2023 10 2.40414e+01 2.25556e+00 576 2023 11 1.95343e+01 1.69922e+00 356 2023 12 1.44519e+01 1.47323e+00 312 2024 1 1.31148e+01 1.78765e+00 306 2024 2 1.53976e+01 1.94402e+00 349 2024 3 1.97829e+01 2.03002e+00 300 2024 4 2.12098e+01 1.12304e+00 32