YEAR MONTH MEAN STDEV COUNT 2000 1 nan nan 0 2000 2 1.71781e+01 1.11424e-01 16 2000 3 1.92759e+01 7.34777e-01 102 2000 4 2.07194e+01 1.30410e+00 90 2000 5 2.43535e+01 1.60405e+00 99 2000 6 2.75197e+01 1.56399e+00 73 2000 7 2.95360e+01 1.41102e+00 83 2000 8 2.82651e+01 7.51129e-01 48 2000 9 2.65990e+01 1.89750e+00 73 2000 10 2.24407e+01 1.58971e+00 107 2000 11 2.08812e+01 2.56539e+00 54 2000 12 nan nan 0 2001 1 1.30528e+01 1.11133e-01 9 2001 2 1.63997e+01 1.03350e+00 30 2001 3 1.75431e+01 1.51419e+00 54 2001 4 1.85313e+01 2.53167e+00 63 2001 5 2.31057e+01 1.59730e+00 126 2001 6 2.73606e+01 5.80373e-02 16 2001 7 2.69370e+01 9.00817e-01 27 2001 8 2.78269e+01 1.00720e+00 128 2001 9 2.74513e+01 1.33678e+00 82 2001 10 2.29877e+01 1.28764e+00 69 2001 11 2.03310e+01 1.20586e+00 68 2001 12 1.96057e+01 1.90259e+00 107 2002 1 nan nan 0 2002 2 1.43243e+01 4.93143e-01 48 2002 3 1.94137e+01 2.11593e+00 32 2002 4 2.19971e+01 2.37751e+00 72 2002 5 2.52359e+01 1.58403e+00 126 2002 6 2.72201e+01 1.45049e+00 85 2002 7 2.91047e+01 1.41922e+00 358 2002 8 2.86865e+01 1.24164e+00 441 2002 9 2.78623e+01 1.11135e+00 258 2002 10 2.68323e+01 1.83261e+00 256 2002 11 2.11734e+01 2.59743e+00 145 2002 12 1.58067e+01 7.28542e-01 95 2003 1 1.36284e+01 9.38905e-01 135 2003 2 1.38555e+01 1.19530e+00 122 2003 3 1.92930e+01 1.86650e+00 127 2003 4 1.98594e+01 2.17465e+00 305 2003 5 2.52094e+01 1.17789e+00 379 2003 6 2.75475e+01 1.57114e+00 273 2003 7 2.83402e+01 1.47047e+00 295 2003 8 2.82323e+01 1.65839e+00 388 2003 9 2.73132e+01 1.38486e+00 322 2003 10 2.32910e+01 1.43652e+00 257 2003 11 2.15777e+01 1.48671e+00 374 2003 12 1.53864e+01 4.00405e-01 32 2004 1 1.36508e+01 6.60401e-01 61 2004 2 1.34412e+01 1.21662e+00 41 2004 3 1.73953e+01 1.63830e+00 296 2004 4 1.92784e+01 1.48109e+00 317 2004 5 2.45713e+01 2.12653e+00 561 2004 6 2.82531e+01 1.61696e+00 459 2004 7 2.85778e+01 1.41133e+00 469 2004 8 2.86524e+01 1.74819e+00 453 2004 9 2.67011e+01 1.94893e+00 341 2004 10 2.43377e+01 1.36467e+00 393 2004 11 2.18723e+01 2.45735e+00 158 2004 12 1.73098e+01 9.29577e-01 29 2005 1 1.38940e+01 7.39758e-01 53 2005 2 1.49136e+01 1.06607e+00 125 2005 3 1.57099e+01 1.47360e+00 192 2005 4 1.95929e+01 1.56756e+00 320 2005 5 2.32202e+01 2.42801e+00 422 2005 6 2.74102e+01 1.67525e+00 427 2005 7 2.81352e+01 1.82739e+00 431 2005 8 2.89426e+01 1.67085e+00 408 2005 9 2.77518e+01 1.62768e+00 506 2005 10 2.51495e+01 1.87671e+00 337 2005 11 1.97110e+01 1.68209e+00 213 2005 12 1.56124e+01 1.27389e+00 97 2006 1 1.47435e+01 1.00721e+00 150 2006 2 1.33616e+01 1.06264e+00 89 2006 3 1.67012e+01 1.04763e+00 244 2006 4 2.19141e+01 2.00729e+00 293 2006 5 2.42282e+01 1.62265e+00 337 2006 6 2.75869e+01 1.70694e+00 377 2006 7 2.92685e+01 1.43705e+00 322 2006 8 2.98438e+01 1.53144e+00 426 2006 9 2.78029e+01 1.67494e+00 338 2006 10 2.52207e+01 1.70339e+00 237 2006 11 1.83440e+01 1.50317e+00 121 2006 12 1.74226e+01 1.33800e+00 17 2007 1 1.69199e+01 2.55724e+00 34 2007 2 1.35506e+01 1.46520e+00 96 2007 3 1.73854e+01 1.81004e+00 349 2007 4 1.87250e+01 2.19751e+00 246 2007 5 2.29746e+01 1.00524e+00 462 2007 6 2.69419e+01 1.84865e+00 447 2007 7 2.83848e+01 1.65430e+00 326 2007 8 2.93296e+01 1.46135e+00 450 2007 9 2.79175e+01 1.74654e+00 385 2007 10 2.56383e+01 1.56847e+00 279 2007 11 1.96297e+01 1.08246e+00 186 2007 12 1.71435e+01 1.33712e+00 88 2008 1 1.48764e+01 9.33439e-01 47 2008 2 1.57361e+01 1.28725e+00 161 2008 3 1.66299e+01 1.75829e+00 171 2008 4 2.04274e+01 1.70199e+00 281 2008 5 2.40203e+01 2.08902e+00 366 2008 6 2.76107e+01 1.34846e+00 381 2008 7 2.83630e+01 1.55542e+00 443 2008 8 2.70916e+01 1.89970e+00 313 2008 9 2.72531e+01 1.79247e+00 343 2008 10 2.34903e+01 1.48952e+00 267 2008 11 1.87239e+01 1.91375e+00 175 2008 12 1.67254e+01 1.21291e+00 78 2009 1 1.55003e+01 1.85124e+00 149 2009 2 1.40094e+01 1.40313e+00 111 2009 3 1.79734e+01 1.27184e+00 274 2009 4 2.07832e+01 2.46564e+00 272 2009 5 2.50389e+01 1.41474e+00 300 2009 6 2.75482e+01 1.93653e+00 518 2009 7 2.78727e+01 1.67778e+00 515 2009 8 2.87335e+01 1.35289e+00 388 2009 9 2.76989e+01 1.26796e+00 367 2009 10 2.55350e+01 2.40577e+00 309 2009 11 1.91439e+01 2.12490e+00 104 2009 12 1.33607e+01 1.68172e+00 65 2010 1 1.23477e+01 1.66880e+00 63 2010 2 1.17596e+01 1.49388e+00 88 2010 3 1.50177e+01 9.58555e-01 153 2010 4 2.01210e+01 1.71064e+00 325 2010 5 2.55666e+01 2.22314e+00 424 2010 6 2.92599e+01 1.42244e+00 467 2010 7 2.89873e+01 1.43466e+00 474 2010 8 2.91330e+01 1.88770e+00 317 2010 9 2.88373e+01 1.58237e+00 442 2010 10 2.32431e+01 1.40745e+00 362 2010 11 1.94090e+01 1.35999e+00 303 2010 12 1.46975e+01 2.59028e+00 162 2011 1 1.12380e+01 1.24686e+00 123 2011 2 1.49473e+01 3.26730e+00 88 2011 3 1.83723e+01 1.74243e+00 275 2011 4 2.17158e+01 1.95956e+00 394 2011 5 2.43428e+01 1.91029e+00 441 2011 6 2.82742e+01 1.59102e+00 422 2011 7 2.92794e+01 1.37317e+00 315 2011 8 2.92948e+01 1.46093e+00 506 2011 9 2.67737e+01 1.25879e+00 423 2011 10 2.30315e+01 1.99987e+00 286 2011 11 1.87098e+01 1.05160e+00 221 2011 12 1.56439e+01 1.13594e+00 182 2012 1 1.48389e+01 1.12764e+00 231 2012 2 1.43457e+01 7.93562e-01 35 2012 3 2.00282e+01 2.06966e+00 288 2012 4 2.22680e+01 1.09067e+00 391 2012 5 2.56397e+01 1.53644e+00 505 2012 6 2.61942e+01 1.03708e+00 302 2012 7 2.78117e+01 1.59557e+00 322 2012 8 2.78403e+01 1.47090e+00 350 2012 9 2.63142e+01 1.59812e+00 459 2012 10 2.42139e+01 1.61296e+00 395 2012 11 1.89336e+01 1.42540e+00 203 2012 12 1.71431e+01 1.35577e+00 185 2013 1 1.65721e+01 1.40309e+00 133 2013 2 1.59995e+01 1.58532e+00 137 2013 3 1.57045e+01 1.40102e+00 225 2013 4 1.98935e+01 1.82758e+00 241 2013 5 2.35172e+01 2.31538e+00 420 2013 6 2.75565e+01 1.12696e+00 401 2013 7 2.73690e+01 1.32030e+00 240 2013 8 2.80559e+01 2.13670e+00 330 2013 9 2.84739e+01 1.75216e+00 363 2013 10 2.43524e+01 2.06093e+00 259 2013 11 2.00548e+01 1.83377e+00 179 2013 12 1.77618e+01 2.16442e+00 135 2014 1 1.21562e+01 9.72728e-01 72 2014 2 1.31552e+01 2.49062e+00 150 2014 3 1.65378e+01 1.37585e+00 244 2014 4 1.91877e+01 2.46703e+00 311 2014 5 2.41424e+01 2.28498e+00 324 2014 6 2.76256e+01 1.88219e+00 449 2014 7 2.78133e+01 1.29421e+00 521 2014 8 2.89305e+01 1.55555e+00 447 2014 9 2.83922e+01 1.31857e+00 323 2014 10 2.50606e+01 1.84398e+00 368 2014 11 1.81940e+01 2.65616e+00 99 2014 12 1.64323e+01 1.54729e+00 108 2015 1 1.39352e+01 1.27316e+00 142 2015 2 1.37289e+01 8.33725e-01 152 2015 3 1.81161e+01 2.15639e+00 219 2015 4 2.14058e+01 1.95856e+00 207 2015 5 2.52882e+01 2.48315e+00 458 2015 6 2.87068e+01 1.61675e+00 411 2015 7 2.79588e+01 1.68330e+00 354 2015 8 2.92955e+01 1.51708e+00 521 2015 9 2.72026e+01 1.44325e+00 281 2015 10 2.37076e+01 1.33747e+00 412 2015 11 2.16982e+01 2.53413e+00 263 2015 12 1.87936e+01 1.68850e+00 105 2016 1 1.38108e+01 1.01807e+00 93 2016 2 1.43551e+01 1.23613e+00 180 2016 3 1.75265e+01 1.61478e+00 240 2016 4 2.09348e+01 2.16316e+00 367 2016 5 2.40093e+01 1.67191e+00 329 2016 6 2.79261e+01 2.03898e+00 456 2016 7 2.99649e+01 1.54152e+00 511 2016 8 2.95657e+01 1.47990e+00 361 2016 9 2.83136e+01 1.50603e+00 486 2016 10 2.48990e+01 1.28516e+00 427 2016 11 2.09270e+01 2.51532e+00 248 2016 12 1.80077e+01 1.52877e+00 224 2017 1 1.63730e+01 1.63783e+00 187 2017 2 1.75232e+01 1.55434e+00 274 2017 3 1.88187e+01 1.76016e+00 260 2017 4 2.22203e+01 1.77801e+00 351 2017 5 2.39649e+01 1.81104e+00 295 2017 6 2.65250e+01 1.91915e+00 279 2017 7 2.94479e+01 1.61737e+00 390 2017 8 2.94730e+01 1.83094e+00 356 2017 9 2.70315e+01 1.29541e+00 338 2017 10 2.50945e+01 1.76632e+00 410 2017 11 2.04223e+01 1.73392e+00 281 2017 12 1.71125e+01 2.10495e+00 92 2018 1 1.29559e+01 1.46717e+00 46 2018 2 1.88477e+01 2.99176e+00 324 2018 3 1.80467e+01 1.55526e+00 271 2018 4 2.00449e+01 1.12990e+00 306 2018 5 2.48274e+01 1.96094e+00 446 2018 6 2.83421e+01 2.15320e+00 347 2018 7 2.90673e+01 1.41003e+00 450 2018 8 2.85451e+01 2.00076e+00 416 2018 9 2.93287e+01 1.58403e+00 462 2018 10 2.58656e+01 2.25233e+00 401 2018 11 2.09843e+01 2.36720e+00 76 2018 12 1.56658e+01 1.71811e+00 80 2019 1 1.49426e+01 1.54443e+00 136 2019 2 1.71655e+01 1.55061e+00 120 2019 3 1.69789e+01 1.49801e+00 185 2019 4 2.06959e+01 1.73157e+00 284 2019 5 2.61437e+01 2.57307e+00 439 2019 6 2.83964e+01 1.77712e+00 231 2019 7 2.91403e+01 2.22689e+00 389 2019 8 2.98336e+01 1.80014e+00 346 2019 9 2.92201e+01 1.86361e+00 502 2019 10 2.78431e+01 2.34684e+00 388 2019 11 1.92930e+01 1.74525e+00 208 2019 12 1.68992e+01 1.61239e+00 163 2020 1 1.65117e+01 2.01330e+00 229 2020 2 1.61233e+01 1.54271e+00 163 2020 3 2.17357e+01 3.58613e+00 349 2020 4 2.25524e+01 1.71717e+00 194 2020 5 2.37651e+01 2.27554e+00 327 2020 6 2.87090e+01 2.15490e+00 434 2020 7 2.89215e+01 1.39324e+00 315 2020 8 3.05708e+01 2.10955e+00 390 2020 9 2.87813e+01 2.60431e+00 412 2020 10 2.52790e+01 1.78218e+00 370 2020 11 2.17376e+01 1.33116e+00 376 2020 12 1.61039e+01 1.38124e+00 234 2021 1 1.49865e+01 1.39595e+00 200 2021 2 1.54513e+01 2.08926e+00 121 2021 3 1.86298e+01 2.53048e+00 171 2021 4 2.10748e+01 2.32533e+00 228 2021 5 2.45539e+01 2.06513e+00 294 2021 6 2.76929e+01 1.86775e+00 283 2021 7 3.02522e+01 2.21772e+00 360 2021 8 2.97896e+01 2.21331e+00 405 2021 9 2.88310e+01 2.36740e+00 324 2021 10 2.55567e+01 2.03549e+00 359 2021 11 1.98196e+01 1.47687e+00 310 2021 12 1.86154e+01 1.29658e+00 256 2022 1 1.57920e+01 2.95071e+00 220 2022 2 1.57324e+01 2.80469e+00 159 2022 3 1.84471e+01 1.52963e+00 289 2022 4 2.13641e+01 2.29636e+00 180 2022 5 2.57256e+01 1.79043e+00 404 2022 6 2.91262e+01 2.38847e+00 521 2022 7 2.99191e+01 1.88539e+00 495 2022 8 3.01159e+01 2.06201e+00 487 2022 9 2.84722e+01 1.99360e+00 421 2022 10 2.41437e+01 2.36681e+00 251 2022 11 2.09776e+01 2.36731e+00 270 2022 12 1.81752e+01 2.44172e+00 260 2023 1 1.61680e+01 1.23458e+00 245 2023 2 1.80216e+01 1.83010e+00 296 2023 3 2.00082e+01 1.58251e+00 219 2023 4 2.23311e+01 1.96706e+00 412 2023 5 2.46144e+01 2.70686e+00 319 2023 6 2.81738e+01 2.83256e+00 469 2023 7 3.02188e+01 1.81724e+00 486 2023 8 3.06980e+01 1.49851e+00 520 2023 9 2.95513e+01 2.08128e+00 529 2023 10 2.44606e+01 2.54521e+00 423 2023 11 2.03652e+01 1.53326e+00 221 2023 12 1.48340e+01 1.27688e+00 204 2024 1 1.35509e+01 1.49996e+00 190 2024 2 1.53255e+01 1.63278e+00 232 2024 3 1.88321e+01 1.23081e+00 185 2024 4 2.10831e+01 1.49668e+00 24