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 2.01543e+01 3.85923e+00 36
2002  8 1.75186e+01 6.95514e+00 63
2002  9 5.25050e+00 2.21529e+00 72
2002 10 8.77257e+00 6.40608e+00 162
2002 11 5.50564e+00 3.85716e+00 238
2002 12 5.39199e+00 4.60227e+00 208
2003  1 6.10843e+00 5.13144e+00 188
2003  2 1.12830e+01 5.73569e+00 192
2003  3 3.88886e+00 3.53682e+00 77
2003  4 1.09168e+01 6.73734e+00 144
2003  5 4.61302e+00 6.02678e+00 82
2003  6 2.28159e+01 1.30794e+01 64
2003  7 5.91629e+00 1.90947e+00 34
2003  8 1.36029e+00 1.49771e+00 46
2003  9 5.86360e+00 8.08218e+00 38
2003 10 1.15833e+01 6.42382e+00 209
2003 11 7.75048e+00 5.45895e+00 249
2003 12 1.50872e+01 8.65941e+00 223
2004  1 1.85722e+01 4.19332e+00 128
2004  2 8.97990e+00 4.68533e+00 64
2004  3 1.16610e+01 6.74909e+00 134
2004  4 1.92938e+01 5.89602e+00 164
2004  5 2.01263e+01 3.75173e+00 235
2004  6 1.93284e+01 2.37640e+00 16
2004  7 2.17327e+01 2.24177e+00 48
2004  8 2.10310e+01 2.49234e+00 93
2004  9 1.23199e+01 8.31166e+00 74
2004 10 1.23099e+01 1.10791e+01 144
2004 11 8.53604e+00 7.41952e+00 160
2004 12 8.17665e+00 6.41209e+00 176
2005  1 1.06134e+01 6.95844e+00 144
2005  2 1.15476e+01 5.67504e+00 112
2005  3 1.00375e+01 7.44332e+00 192
2005  4 3.48174e+00 2.61257e+00 112
2005  5 1.17348e+01 7.56864e+00 110
2005  6 1.73462e+01 4.45231e+00 64
2005  7 1.19088e+01 8.01864e+00 95
2005  8 3.38595e+01 2.32715e-01 16
2005  9 5.00772e+00 4.09560e+00 64
2005 10 6.84899e+00 4.17178e+00 231
2005 11 8.07607e+00 6.44298e+00 231
2005 12 6.92675e+00 5.12595e+00 152
2006  1 7.12815e+00 5.51400e+00 208
2006  2 6.50155e+00 7.28744e+00 188
2006  3 1.58854e+01 4.44729e+00 234
2006  4 1.65635e+01 3.92430e+00 176
2006  5 2.39489e+01 4.96238e+00 176
2006  6 2.64006e+01 5.40136e+00 105
2006  7 2.11825e+01 5.53106e+00 48
2006  8 2.28505e+01 4.43767e+00 78
2006  9 1.66308e+01 7.55839e+00 141
2006 10 1.53980e+01 6.72935e+00 208
2006 11 1.38072e+01 6.55724e+00 261
2006 12 1.32615e+01 7.49834e+00 174
2007  1 8.49751e+00 4.12546e+00 89
2007  2 1.22784e+01 5.93282e+00 208
2007  3 1.49491e+01 7.04593e+00 286
2007  4 2.05671e+01 4.68375e+00 141
2007  5 2.23659e+01 4.98704e+00 96
2007  6 1.88694e+01 3.71705e+00 48
2007  7 2.25479e+01 4.34281e+00 80
2007  8 2.06148e+01 5.97078e+00 112
2007  9 7.13578e+00 5.82973e+00 112
2007 10 8.83836e+00 7.33214e+00 125
2007 11 9.38970e+00 7.28676e+00 223
2007 12 1.31385e+01 7.52388e+00 142
2008  1 1.36829e+01 6.31612e+00 208
2008  2 1.60285e+01 4.82916e+00 255
2008  3 6.64788e+00 4.65697e+00 194
2008  4 1.35178e+01 5.01059e+00 140
2008  5 1.41438e+01 3.14484e+00 109
2008  6 1.67807e+01 6.63866e+00 96
2008  7 2.05438e+01 7.60673e+00 64
2008  8 2.93443e+01 3.05385e+00 46
2008  9 7.53613e+00 7.31043e+00 112
2008 10 8.91240e+00 5.05420e+00 224
2008 11 1.30649e+01 5.39330e+00 256
2008 12 8.39840e+00 7.14415e+00 176
2009  1 1.32962e+01 8.03125e+00 223
2009  2 1.59048e+01 5.06356e+00 224
2009  3 1.45159e+01 5.16551e+00 220
2009  4 4.39630e+00 5.28747e+00 98
2009  5 8.47996e+00 7.40884e+00 76
2009  6 2.01367e+01 9.04021e+00 68
2009  7 2.33437e+01 4.89303e+00 48
2009  8 1.79528e+01 9.26869e+00 110
2009  9 1.57204e+01 1.19987e+01 104
2009 10 1.19459e+01 8.63753e+00 159
2009 11 6.89182e+00 5.41411e+00 144
2009 12 2.82127e+00 2.94107e+00 48
2010  1 3.28500e+00 3.65493e+00 172
2010  2 2.92880e+00 1.92647e+00 169
2010  3 5.96648e+00 4.46884e+00 192
2010  4 4.94966e+00 3.70359e+00 207
2010  5 1.22072e+01 7.95122e+00 130
2010  6 2.28879e+01 9.97774e+00 96
2010  7 1.81257e+01 3.80117e+00 53
2010  8 2.34982e+01 7.68625e+00 48
2010  9 2.02473e+01 5.97171e+00 184
2010 10 1.79812e+01 7.66398e+00 382
2010 11 1.70710e+01 7.48098e+00 267
2010 12 9.19452e+00 7.47975e+00 224
2011  1 1.22555e+01 4.63820e+00 240
2011  2 1.59032e+01 3.20018e+00 237
2011  3 1.30818e+01 3.32355e+00 192
2011  4 1.44517e+01 4.89452e+00 160
2011  5 1.90443e+01 4.41607e+00 230
2011  6 1.94717e+01 5.44701e+00 128
2011  7 1.83966e+01 2.77431e+00 35
2011  8 1.88050e+01 6.84366e+00 165
2011  9 1.62216e+01 1.05288e+01 176
2011 10 1.73830e+01 5.29281e+00 247
2011 11 1.88187e+01 4.41634e+00 185
2011 12 1.41304e+01 4.55067e+00 168
2012  1 1.60266e+01 5.90821e+00 224
2012  2 1.66386e+01 3.80834e+00 32
2012  3 1.51392e+01 6.33359e+00 201
2012  4 1.89675e+01 5.23799e+00 144
2012  5 2.39206e+01 3.63006e+00 129
2012  6 1.76915e+01 6.45345e+00 96
2012  7 1.30932e+01 1.31472e+01 64
2012  8 1.98692e+01 1.22573e+01 96
2012  9 1.26251e+01 7.93538e+00 97
2012 10 5.13021e+00 6.03629e+00 227
2012 11 1.91811e+01 4.70357e+00 252
2012 12 1.09935e+01 9.29472e+00 96
2013  1 1.79586e+01 1.17620e+01 113
2013  2 2.08829e+01 7.47914e+00 107
2013  3 1.13666e+01 7.46235e+00 154
2013  4 7.33991e+00 8.07240e+00 111
2013  5 1.90584e+01 5.12154e+00 128
2013  6 1.41059e+01 5.68632e+00 53
2013  7 1.44759e+01 6.39594e+00 47
2013  8 2.02651e+01 1.55755e+01 112
2013  9 1.45622e+01 9.82164e+00 178
2013 10 1.18178e+01 7.91162e+00 186
2013 11 8.17109e+00 7.74446e+00 144
2013 12 1.22858e+01 5.90864e+00 181
2014  1 7.22173e+00 4.62609e+00 112
2014  2 1.29855e+01 5.95798e+00 183
2014  3 7.06855e+00 4.53900e+00 156
2014  4 6.49275e+00 4.16649e+00 144
2014  5 5.31294e+00 6.58452e+00 112
2014  6 7.96571e+00 5.70277e+00 80
2014  7 1.77241e+01 4.36864e+00 74
2014  8 2.53415e+01 6.36020e+00 112
2014  9 1.60087e+01 8.50856e+00 117
2014 10 1.68510e+01 6.03524e+00 300
2014 11 1.77745e+01 6.89289e+00 224
2014 12 1.37013e+01 6.20861e+00 204
2015  1 6.48675e+00 6.14201e+00 170
2015  2 9.42114e+00 4.73079e+00 160
2015  3 1.38988e+01 6.19288e+00 156
2015  4 1.44494e+01 6.51006e+00 96
2015  5 1.55665e+01 6.84609e+00 139
2015  6 1.26067e+01 5.38444e+00 110
2015  7 1.67792e+01 5.52766e+00 74
2015  8 1.86368e+01 5.94228e+00 95
2015  9 9.03650e+00 7.10842e+00 64
2015 10 1.13839e+01 1.28543e+01 183
2015 11 7.22802e+00 6.95973e+00 216
2015 12 3.26559e+00 3.15724e+00 94
2016  1 4.30052e+00 5.04689e+00 160
2016  2 4.99382e+00 3.41774e+00 258
2016  3 9.96390e+00 4.90223e+00 144
2016  4 6.87962e+00 6.53967e+00 113
2016  5 9.27452e+00 5.57922e+00 166
2016  6 2.26115e+01 3.77710e+00 144
2016  7 1.46632e+01 7.53573e+00 121
2016  8 2.04306e+01 7.79107e+00 96
2016  9 1.34517e+01 9.45830e+00 84
2016 10 1.11598e+01 7.74233e+00 221
2016 11 1.70268e+01 4.52853e+00 192
2016 12 1.76267e+01 5.18445e+00 208
2017  1 1.32340e+01 7.33128e+00 179
2017  2 1.33391e+01 6.79011e+00 278
2017  3 1.12965e+01 5.88402e+00 192
2017  4 1.51710e+01 6.15701e+00 102
2017  5 1.71941e+01 4.81370e+00 128
2017  6 1.37355e+01 3.02565e+00 32
2017  7 1.10863e+01 4.41890e+00 38
2017  8 1.89263e+01 1.17062e+01 81
2017  9 1.30932e+01 7.12691e+00 123
2017 10 7.99896e+00 7.61002e+00 247
2017 11 1.70003e+01 5.83371e+00 303
2017 12 1.49530e+01 8.18596e+00 175
2018  1 1.57353e+01 6.25511e+00 241
2018  2 1.73320e+01 6.03622e+00 112
2018  3 2.07859e+01 6.52863e+00 239
2018  4 1.58243e+01 7.08588e+00 176
2018  5 1.18610e+01 6.59780e+00 131
2018  6 1.66517e+01 2.71267e+00 68
2018  7 2.24602e+01 6.78614e+00 96
2018  8 8.52646e+00 9.19739e+00 70
2018  9 1.37780e+01 1.18017e+01 158
2018 10 9.02371e+00 9.52675e+00 251
2018 11 4.58871e+00 4.24463e+00 96
2018 12 3.57628e+00 4.78875e+00 128
2019  1 3.25432e+00 4.73174e+00 224
2019  2 1.04099e+00 1.00508e+00 48
2019  3 8.87485e+00 4.63586e+00 192
2019  4 5.57087e+00 1.97598e+00 80
2019  5 1.27788e+01 6.29083e+00 188
2019  6 2.00605e+01 7.73572e+00 91
2019  7 1.52118e+01 8.31305e+00 60
2019  8 2.21221e+01 7.63599e+00 99
2019  9 1.80410e+01 7.66457e+00 166
2019 10 1.64186e+01 9.19209e+00 144
2019 11 1.36718e+01 7.65961e+00 224
2019 12 1.25951e+01 6.52164e+00 160
2020  1 1.25111e+01 5.81019e+00 144
2020  2 8.92743e+00 6.60160e+00 144
2020  3 4.47144e+00 7.07697e+00 171
2020  4 1.10423e+01 6.36408e+00 154
2020  5 1.05732e+01 5.19647e+00 108
2020  6 1.24772e+01 5.52751e+00 48
2020  7 1.16372e+01 9.02909e+00 31
2020  8 2.46278e+01 2.04690e+00 64
2020  9 2.39641e+00 2.61416e+00 68
2020 10 3.53951e+00 4.18964e+00 181
2020 11 5.27836e+00 4.69248e+00 217
2020 12 6.95055e+00 6.59611e+00 272
2021  1 6.32706e+00 2.93160e+00 144
2021  2 5.14064e+00 4.33823e+00 96
2021  3 5.35763e+00 3.53412e+00 128
2021  4 1.23221e+01 7.43573e+00 160
2021  5 8.02054e+00 5.20384e+00 103
2021  6 1.17318e+01 7.01560e+00 40
2021  7 9.89910e+00 6.58295e+00 78
2021  8 1.01699e+01 6.75601e+00 84
2021  9 1.25444e+01 1.36468e+01 64
2021 10 4.66888e+00 7.37670e+00 85
2021 11 5.46442e+00 3.74160e+00 204
2021 12 9.18484e+00 2.27620e+00 80
2022  1 1.09136e+01 6.70743e+00 224
2022  2 1.43654e+01 6.21732e+00 151
2022  3 1.81162e+01 6.94588e+00 208
2022  4 3.75890e+00 1.96909e+00 48
2022  5 1.08539e+01 7.47009e+00 80
2022  6 1.99935e+01 5.85372e+00 99
2022  7 1.67415e+01 7.94050e+00 90
2022  8 1.57147e+01 5.90395e+00 128
2022  9 1.12945e+01 8.66778e+00 125
2022 10 9.70818e+00 6.11994e+00 276
2022 11 1.12581e+01 5.35682e+00 132
2022 12 1.50978e+01 8.34124e+00 211
2023  1 1.91300e+01 6.59471e+00 208
2023  2 1.90650e+01 7.55850e+00 192
2023  3 1.92442e+01 6.72190e+00 141
2023  4 1.75930e+01 5.37587e+00 112
2023  5 1.89458e+01 7.49965e+00 112
2023  6 2.17144e+01 2.91105e+00 47
2023  7 1.66585e+01 4.62449e+00 53
2023  8 1.39667e+01 5.33257e+00 65
2023  9 1.42133e+01 6.74041e+00 138
2023 10 1.04107e+01 7.43536e+00 210
2023 11 1.14382e+01 6.67839e+00 168
2023 12 8.64909e+00 6.54946e+00 80
2024  1 5.01819e+00 3.51633e+00 128
2024  2 1.35795e+01 6.31818e+00 170
2024  3 1.13574e+01 6.85579e+00 98
2024  4 nan nan 0