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 5.91895e+01 5.73565e-02 73 2002 8 5.97435e+01 1.37506e-03 28 2002 9 5.67640e+01 9.34706e-01 169 2002 10 4.96640e+01 2.26827e+00 304 2002 11 4.47249e+01 2.08710e+00 281 2002 12 4.01951e+01 1.88961e-01 427 2003 1 4.18708e+01 1.53559e+00 557 2003 2 4.74916e+01 2.32399e+00 236 2003 3 5.34768e+01 1.47978e+00 458 2003 4 5.81802e+01 3.79591e-03 54 2003 5 6.02208e+01 2.38653e-02 13 2003 6 5.93120e+01 8.44973e-02 157 2003 7 5.90187e+01 4.22991e-03 57 2003 8 5.92079e+01 4.40994e-01 102 2003 9 5.56116e+01 1.83362e+00 237 2003 10 4.98817e+01 2.11089e+00 300 2003 11 4.34719e+01 2.02082e+00 176 2003 12 4.03618e+01 4.56721e-01 458 2004 1 4.24880e+01 1.45361e+00 671 2004 2 4.77137e+01 2.65536e+00 244 2004 3 5.53328e+01 1.83116e+00 189 2004 4 5.90799e+01 6.15428e-01 154 2004 5 6.00823e+01 8.72110e-03 25 2004 6 5.94945e+01 4.21649e-03 38 2004 7 5.90126e+01 9.43015e-02 90 2004 8 5.93756e+01 5.24391e-01 128 2004 9 5.52400e+01 1.15476e+00 231 2004 10 5.00268e+01 1.91691e+00 398 2004 11 4.29678e+01 1.67605e+00 504 2004 12 4.01024e+01 2.29660e-01 484 2005 1 4.17398e+01 1.01986e+00 362 2005 2 4.76249e+01 1.62566e+00 582 2005 3 5.42045e+01 1.13008e+00 396 2005 4 5.81661e+01 7.77111e-01 153 2005 5 6.01733e+01 6.73007e-02 163 2005 6 5.93422e+01 2.45220e-03 41 2005 7 5.87014e+01 4.58184e-03 58 2005 8 5.81175e+01 1.09408e-01 94 2005 9 5.62156e+01 1.11378e+00 186 2005 10 5.07689e+01 2.59306e+00 60 2005 11 4.32586e+01 1.56505e+00 329 2005 12 4.03315e+01 3.24786e-01 485 2006 1 4.19036e+01 1.16402e+00 358 2006 2 4.71811e+01 1.09480e+00 245 2006 3 5.38752e+01 1.73350e+00 369 2006 4 5.91317e+01 7.31049e-01 375 2006 5 6.02225e+01 9.52539e-02 279 2006 6 5.93040e+01 0.00000e+00 2 2006 7 5.90422e+01 1.29768e-01 230 2006 8 5.91131e+01 1.02881e-01 128 2006 9 5.54184e+01 1.30801e+00 206 2006 10 5.08841e+01 1.50125e+00 280 2006 11 4.44300e+01 1.50565e+00 424 2006 12 4.01193e+01 3.09036e-01 377 2007 1 4.29345e+01 1.19743e+00 440 2007 2 4.77271e+01 1.92842e+00 681 2007 3 5.37102e+01 2.28121e+00 186 2007 4 5.87425e+01 5.01408e-01 223 2007 5 6.02293e+01 5.49748e-02 83 2007 6 5.96825e+01 3.24134e-01 169 2007 7 5.91924e+01 2.15742e-03 34 2007 8 5.89098e+01 6.46551e-01 91 2007 9 5.63135e+01 1.17185e+00 267 2007 10 5.00314e+01 3.14943e-01 78 2007 11 4.30730e+01 1.50328e+00 342 2007 12 4.01511e+01 4.71215e-01 327 2008 1 4.19960e+01 1.24759e+00 657 2008 2 4.75510e+01 1.39523e+00 345 2008 3 5.50769e+01 1.11273e+00 182 2008 4 5.87125e+01 3.31300e-01 192 2008 5 6.02242e+01 4.65665e-02 163 2008 6 5.94506e+01 3.94257e-02 16 2008 7 5.89818e+01 1.66233e-01 90 2008 8 5.87195e+01 5.83233e-01 194 2008 9 5.52012e+01 1.25457e+00 237 2008 10 5.00435e+01 1.92084e+00 363 2008 11 4.25783e+01 9.06154e-01 155 2008 12 4.02366e+01 2.52884e-01 405 2009 1 4.24433e+01 1.58729e+00 535 2009 2 4.92432e+01 9.66017e-01 167 2009 3 5.46239e+01 1.70018e+00 460 2009 4 5.85614e+01 6.16401e-01 245 2009 5 5.99915e+01 8.84196e-02 65 2009 6 6.00174e+01 4.26944e-01 21 2009 7 5.90302e+01 3.73809e-01 13 2009 8 5.86908e+01 4.95489e-03 19 2009 9 5.54173e+01 1.56133e+00 269 2009 10 4.89259e+01 1.52902e+00 251 2009 11 4.34184e+01 7.49064e-01 320 2009 12 4.03587e+01 4.24930e-01 362 2010 1 4.22281e+01 1.53051e+00 359 2010 2 4.70721e+01 1.20410e+00 425 2010 3 5.52798e+01 1.13826e+00 314 2010 4 5.76850e+01 4.72674e-01 129 2010 5 6.01250e+01 1.01738e-02 64 2010 6 5.91690e+01 1.48121e-01 119 2010 7 nan nan 0 2010 8 5.89541e+01 4.97527e-01 301 2010 9 5.65771e+01 4.59694e-01 204 2010 10 5.00746e+01 1.02498e+00 227 2010 11 4.26060e+01 7.56028e-01 249 2010 12 4.06912e+01 3.09326e-01 340 2011 1 4.24349e+01 1.40130e+00 432 2011 2 4.82815e+01 2.03992e+00 493 2011 3 5.44728e+01 1.32857e+00 510 2011 4 5.89285e+01 4.54328e-01 314 2011 5 6.01732e+01 1.10323e-01 155 2011 6 5.93517e+01 2.66591e-02 75 2011 7 5.91636e+01 5.18500e-02 39 2011 8 5.84173e+01 6.89721e-01 76 2011 9 5.52956e+01 1.69556e+00 325 2011 10 4.86169e+01 1.28881e+00 145 2011 11 4.33540e+01 1.33581e+00 332 2011 12 4.02671e+01 2.90512e-01 666 2012 1 4.23332e+01 1.33393e+00 613 2012 2 4.84326e+01 1.42103e+00 228 2012 3 5.48092e+01 9.37021e-01 242 2012 4 5.90820e+01 5.70119e-01 367 2012 5 6.01340e+01 2.06745e-01 312 2012 6 5.95264e+01 5.15257e-03 125 2012 7 5.91980e+01 1.41434e-01 92 2012 8 5.82043e+01 3.32528e-01 128 2012 9 5.65446e+01 1.29444e+00 210 2012 10 4.99141e+01 2.16039e+00 297 2012 11 4.38230e+01 1.39292e+00 466 2012 12 4.03301e+01 3.76421e-01 532 2013 1 4.20706e+01 1.38353e+00 239 2013 2 4.86620e+01 2.14953e+00 286 2013 3 5.45629e+01 1.62090e+00 331 2013 4 5.89402e+01 6.75391e-01 217 2013 5 6.00982e+01 5.42075e-02 138 2013 6 nan nan 0 2013 7 5.89030e+01 1.47352e-01 12 2013 8 5.78557e+01 3.76916e-03 7 2013 9 5.50048e+01 6.35330e-01 181 2013 10 5.11677e+01 2.49691e+00 92 2013 11 4.42942e+01 1.29547e+00 161 2013 12 4.02654e+01 3.67072e-01 410 2014 1 4.20736e+01 1.55307e+00 408 2014 2 4.75423e+01 6.13874e-01 144 2014 3 5.44272e+01 1.36686e+00 316 2014 4 5.89262e+01 8.50777e-01 309 2014 5 5.99791e+01 9.64143e-02 202 2014 6 5.92590e+01 7.38767e-03 53 2014 7 5.87345e+01 1.29812e-01 111 2014 8 5.97433e+01 1.10312e-01 9 2014 9 5.58930e+01 1.46116e+00 187 2014 10 5.04038e+01 1.88340e+00 343 2014 11 4.45206e+01 1.59106e+00 233 2014 12 4.03550e+01 4.63067e-01 319 2015 1 4.24304e+01 1.39623e+00 357 2015 2 4.77532e+01 2.35896e+00 178 2015 3 5.49002e+01 1.73711e+00 303 2015 4 5.86937e+01 7.92791e-01 117 2015 5 6.01692e+01 1.16069e-02 64 2015 6 nan nan 0 2015 7 5.87932e+01 2.54097e-03 58 2015 8 5.91951e+01 5.53848e-01 106 2015 9 5.59026e+01 1.38665e+00 360 2015 10 4.93482e+01 1.37751e+00 364 2015 11 4.38013e+01 1.20282e+00 206 2015 12 4.03296e+01 3.66986e-01 178 2016 1 4.25052e+01 1.41945e+00 653 2016 2 4.76033e+01 2.25539e+00 417 2016 3 5.40418e+01 1.42779e-03 64 2016 4 5.84894e+01 5.75168e-01 307 2016 5 6.02723e+01 3.52787e-03 64 2016 6 5.93126e+01 3.18559e-02 191 2016 7 5.90385e+01 4.78298e-03 64 2016 8 5.91619e+01 3.46106e-01 147 2016 9 5.53593e+01 1.11640e+00 283 2016 10 4.95585e+01 1.63315e+00 314 2016 11 4.30709e+01 1.33501e+00 210 2016 12 4.01421e+01 2.46468e-01 239 2017 1 4.26513e+01 1.36635e+00 612 2017 2 4.87543e+01 1.28518e+00 367 2017 3 5.52410e+01 1.21492e+00 145 2017 4 5.83514e+01 7.03326e-01 284 2017 5 6.00255e+01 1.08276e-01 260 2017 6 5.96058e+01 3.35109e-01 248 2017 7 5.88488e+01 1.99654e-01 202 2017 8 5.90476e+01 7.66789e-01 177 2017 9 5.62344e+01 5.85616e-01 166 2017 10 5.02096e+01 7.28723e-01 124 2017 11 4.29259e+01 1.83691e+00 284 2017 12 4.02841e+01 4.16248e-01 548 2018 1 4.14754e+01 8.70047e-01 157 2018 2 4.85192e+01 2.29690e+00 199 2018 3 5.50271e+01 2.01889e+00 366 2018 4 5.87510e+01 8.39217e-01 297 2018 5 6.01135e+01 1.89421e-01 227 2018 6 5.99941e+01 3.77255e-01 89 2018 7 5.89104e+01 3.66738e-03 5 2018 8 5.93836e+01 2.93567e-01 89 2018 9 5.61344e+01 9.08725e-01 107 2018 10 4.85673e+01 1.15999e+00 280 2018 11 4.30749e+01 1.47574e+00 419 2018 12 4.04714e+01 4.47530e-01 332 2019 1 4.20069e+01 1.28199e+00 329 2019 2 4.79067e+01 1.52970e+00 224 2019 3 5.45543e+01 1.52106e+00 217 2019 4 5.86454e+01 8.35650e-01 272 2019 5 6.02709e+01 5.20782e-02 34 2019 6 5.94433e+01 3.51073e-01 82 2019 7 5.89870e+01 2.03824e-01 115 2019 8 5.89996e+01 5.61168e-01 305 2019 9 5.60290e+01 9.82788e-01 143 2019 10 4.92516e+01 1.75710e+00 212 2019 11 4.33925e+01 1.44011e+00 396 2019 12 4.03730e+01 4.13380e-01 389 2020 1 4.22218e+01 1.70503e+00 529 2020 2 4.95302e+01 2.02788e+00 286 2020 3 5.49650e+01 1.71843e+00 326 2020 4 5.88496e+01 7.40342e-01 348 2020 5 6.00858e+01 1.62751e-01 404 2020 6 5.92628e+01 4.24256e-02 132 2020 7 5.89762e+01 2.26856e-01 197 2020 8 5.89691e+01 5.42204e-01 157 2020 9 5.54436e+01 1.09480e+00 342 2020 10 4.98964e+01 1.65097e+00 314 2020 11 4.30210e+01 1.45805e+00 247 2020 12 4.02133e+01 3.28675e-01 621 2021 1 4.26772e+01 1.31637e+00 630 2021 2 4.76849e+01 2.09752e+00 319 2021 3 5.27828e+01 7.14769e-01 237 2021 4 5.89210e+01 7.01568e-01 239 2021 5 6.01715e+01 1.25619e-01 505 2021 6 5.94186e+01 5.42152e-03 7 2021 7 5.92490e+01 2.23312e-01 65 2021 8 5.88672e+01 5.23170e-01 87 2021 9 5.55931e+01 1.25990e+00 339 2021 10 4.98027e+01 2.08253e+00 372 2021 11 4.28231e+01 1.45148e+00 340 2021 12 4.02574e+01 3.38893e-01 550 2022 1 4.21479e+01 1.18010e+00 627 2022 2 4.80728e+01 2.01957e+00 338 2022 3 5.26308e+01 1.14070e+00 143 2022 4 5.95781e+01 9.74854e-02 121 2022 5 5.99556e+01 4.11801e-02 127 2022 6 6.00897e+01 3.91542e-01 124 2022 7 nan nan 0 2022 8 5.85946e+01 3.68933e-01 104 2022 9 5.60104e+01 1.51097e+00 259 2022 10 5.12077e+01 1.30585e+00 262 2022 11 4.37024e+01 1.55822e+00 675 2022 12 4.02348e+01 2.74510e-01 789 2023 1 4.24351e+01 1.34214e+00 755 2023 2 4.88646e+01 1.78079e+00 632 2023 3 5.44438e+01 1.34318e+00 568 2023 4 5.90038e+01 5.89711e-01 497 2023 5 6.01188e+01 8.74747e-02 419 2023 6 5.96576e+01 4.26489e-01 156 2023 7 nan nan 0 2023 8 5.81715e+01 1.65913e-03 4 2023 9 5.62455e+01 1.02513e+00 283 2023 10 5.04277e+01 1.44982e+00 593 2023 11 4.37175e+01 1.94800e+00 356 2023 12 4.05782e+01 5.07894e-01 417 2024 1 4.17695e+01 1.27412e+00 671 2024 2 4.79760e+01 1.89035e+00 660 2024 3 5.45795e+01 1.60512e+00 661 2024 4 5.75609e+01 1.40959e-03 64