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 2.76937e+01 7.48082e+00 112
2002  8 1.87474e+01 8.04091e+00 110
2002  9 8.20111e+00 1.49627e+01 61
2002 10 4.19307e+00 5.61968e+00 112
2002 11 9.75655e-01 1.99584e+00 181
2002 12 2.82194e+00 3.88568e+00 171
2003  1 5.77402e-01 5.01432e-01 240
2003  2 6.40718e+00 3.21481e+00 160
2003  3 8.62087e+00 1.22115e+01 107
2003  4 6.30104e+00 5.56936e+00 124
2003  5 nan nan 0
2003  6 1.26210e+01 2.59358e+00 22
2003  7 1.04501e+01 1.14605e+01 64
2003  8 1.05697e+01 1.35585e+01 58
2003  9 5.65824e+00 8.59166e+00 119
2003 10 1.16620e+01 1.15031e+01 242
2003 11 1.22125e+01 6.87077e+00 286
2003 12 1.00040e+01 6.27671e+00 223
2004  1 8.86920e+00 2.61616e+00 142
2004  2 8.51223e+00 5.58281e+00 64
2004  3 1.65651e+01 7.64680e+00 192
2004  4 1.64278e+01 7.33033e+00 169
2004  5 2.69798e+01 7.95676e+00 147
2004  6 1.93948e+01 2.55474e+00 16
2004  7 1.16506e+01 1.21640e+01 64
2004  8 1.91302e+01 6.75375e+00 96
2004  9 1.07969e+01 1.15075e+01 176
2004 10 8.83785e+00 1.01611e+01 116
2004 11 1.72692e+00 2.83192e+00 145
2004 12 1.03623e+00 1.51836e+00 160
2005  1 6.60629e+00 6.84113e+00 132
2005  2 1.69807e+01 9.80702e+00 112
2005  3 1.56313e+01 8.07367e+00 176
2005  4 1.46338e-01 2.05657e-01 98
2005  5 9.62909e+00 7.80364e+00 80
2005  6 1.66608e+01 1.12515e+01 99
2005  7 1.13716e+01 1.07813e+01 117
2005  8 1.09509e+01 1.01276e+01 44
2005  9 3.40752e+00 3.26708e+00 95
2005 10 7.24399e+00 5.52235e+00 347
2005 11 9.57905e+00 4.47696e+00 178
2005 12 9.67934e+00 5.94833e+00 128
2006  1 1.09580e+01 8.33650e+00 144
2006  2 8.85115e+00 4.77951e+00 171
2006  3 1.45722e+01 7.27034e+00 259
2006  4 2.29355e+01 8.02913e+00 171
2006  5 1.48035e+01 8.03917e+00 153
2006  6 1.67856e+01 9.02946e+00 118
2006  7 3.11268e+01 3.09760e+00 32
2006  8 1.25119e+01 3.63261e+00 69
2006  9 5.99967e+00 4.92591e+00 142
2006 10 1.12535e+01 8.05589e+00 192
2006 11 7.63274e+00 5.09441e+00 244
2006 12 1.24490e+01 1.04708e+01 192
2007  1 1.20295e+01 8.42536e+00 96
2007  2 1.82166e+01 5.68205e+00 156
2007  3 2.20243e+01 9.04441e+00 210
2007  4 2.06886e+01 5.78456e+00 150
2007  5 1.68047e+01 4.91267e+00 60
2007  6 2.06660e+01 8.56766e+00 96
2007  7 1.19508e+01 8.67431e+00 64
2007  8 1.83939e+01 1.19043e+01 59
2007  9 1.61039e+01 8.54467e+00 108
2007 10 7.06166e+00 7.36372e+00 189
2007 11 7.35406e+00 8.34206e+00 224
2007 12 1.28609e+01 8.60022e+00 126
2008  1 5.42867e+00 6.06987e+00 144
2008  2 5.44392e+00 6.51357e+00 228
2008  3 2.67862e+00 2.42285e+00 174
2008  4 3.74792e+00 4.03824e+00 83
2008  5 5.31039e+00 1.25116e+00 51
2008  6 8.58127e+00 6.47807e+00 114
2008  7 2.06412e+01 9.03950e+00 96
2008  8 1.68437e+01 8.58811e+00 107
2008  9 1.02653e+01 1.07561e+01 139
2008 10 1.31554e+01 7.63333e+00 257
2008 11 1.46609e+01 6.76960e+00 289
2008 12 7.44056e+00 6.65225e+00 112
2009  1 7.45260e+00 7.98821e+00 184
2009  2 5.75462e+00 2.77055e+00 128
2009  3 1.51642e+01 4.98272e+00 124
2009  4 5.20717e-01 1.15468e+00 76
2009  5 9.93536e+00 1.00829e+01 32
2009  6 1.03186e+01 8.33175e+00 121
2009  7 8.39431e-01 7.22673e-01 16
2009  8 1.29814e+01 6.28673e+00 74
2009  9 6.27210e+00 7.88077e+00 112
2009 10 5.59361e+00 8.52620e+00 136
2009 11 3.39990e+00 5.58561e+00 188
2009 12 1.56917e-01 2.33496e-01 104
2010  1 1.79821e+00 3.23029e+00 176
2010  2 3.80204e-01 7.71173e-01 190
2010  3 1.89839e+00 2.09566e+00 113
2010  4 2.22119e+00 3.06935e+00 133
2010  5 8.09711e+00 7.61808e+00 110
2010  6 1.72810e+01 1.07511e+01 138
2010  7 1.40469e+01 1.08036e+01 99
2010  8 1.31160e+01 9.97855e+00 48
2010  9 7.40765e+00 6.09638e+00 185
2010 10 1.21736e+01 6.84279e+00 335
2010 11 8.62036e+00 7.10700e+00 198
2010 12 5.58697e+00 3.29042e+00 252
2011  1 8.88008e+00 5.85015e+00 223
2011  2 9.33432e+00 6.81952e+00 174
2011  3 1.27518e+01 9.03094e+00 164
2011  4 2.90632e+00 2.95335e+00 96
2011  5 1.27147e+01 8.35734e+00 141
2011  6 1.10460e+01 7.73908e+00 109
2011  7 1.85563e+01 1.06691e+01 108
2011  8 9.67766e+00 8.88996e+00 112
2011  9 6.87492e+00 1.03367e+01 129
2011 10 9.93687e+00 9.16895e+00 332
2011 11 1.78956e+01 7.52513e+00 221
2011 12 1.09207e+01 6.34917e+00 144
2012  1 9.42625e+00 4.81113e+00 206
2012  2 1.36270e+01 3.90222e+00 35
2012  3 1.38186e+01 1.07969e+01 158
2012  4 1.88032e+01 7.28996e+00 185
2012  5 1.27002e+01 6.29557e+00 96
2012  6 1.63448e+01 1.19461e+01 142
2012  7 1.51553e+01 8.69508e+00 54
2012  8 1.23654e+01 8.45373e+00 60
2012  9 5.56943e+00 7.20306e+00 159
2012 10 1.08868e+01 9.00389e+00 296
2012 11 1.46461e+01 5.74267e+00 295
2012 12 1.33778e+01 7.66526e+00 171
2013  1 1.85717e+01 8.77155e+00 128
2013  2 1.25125e+01 8.28195e+00 96
2013  3 3.74186e+00 5.06499e+00 182
2013  4 4.39602e+00 4.68781e+00 76
2013  5 1.08283e+01 6.91367e+00 96
2013  6 1.26918e+01 1.39055e+01 30
2013  7 1.73452e+01 1.54588e+01 83
2013  8 1.00379e+01 1.14947e+01 93
2013  9 1.32237e+01 1.42969e+01 183
2013 10 9.77018e+00 1.06904e+01 207
2013 11 1.24671e+01 9.19142e+00 206
2013 12 1.41897e+01 8.09469e+00 112
2014  1 6.51291e+00 5.50270e+00 160
2014  2 1.30689e+01 5.58185e+00 112
2014  3 6.55327e+00 6.03975e+00 112
2014  4 1.56082e+00 1.39585e+00 80
2014  5 4.02866e+00 5.21061e+00 69
2014  6 1.15573e+01 1.14760e+01 68
2014  7 1.88396e+01 1.39555e+01 80
2014  8 1.89219e+01 1.19131e+01 96
2014  9 2.67123e+01 1.08718e+01 144
2014 10 1.59448e+01 7.36267e+00 324
2014 11 1.41197e+01 5.92848e+00 224
2014 12 1.97037e+01 6.60529e+00 173
2015  1 1.40934e+01 7.84488e+00 208
2015  2 1.38819e+01 8.14028e+00 184
2015  3 1.71415e+01 1.00802e+01 112
2015  4 1.29360e+01 4.46648e+00 49
2015  5 1.32272e+01 6.73038e+00 98
2015  6 1.99792e+01 1.02952e+01 141
2015  7 1.23225e+01 5.74509e+00 66
2015  8 1.73722e+01 9.80306e+00 128
2015  9 2.45053e+01 5.80144e+00 112
2015 10 8.40240e+00 6.87440e+00 181
2015 11 7.65868e-01 2.59000e+00 165
2015 12 3.58312e+00 3.09907e+00 126
2016  1 2.07562e+00 4.94900e+00 144
2016  2 1.30179e+00 2.03871e+00 256
2016  3 3.14459e+00 3.12838e+00 129
2016  4 5.56828e+00 1.07938e+01 124
2016  5 1.15254e+01 1.21170e+01 159
2016  6 1.46679e+01 1.06559e+01 98
2016  7 1.90946e+01 8.75485e+00 109
2016  8 4.62423e+00 4.15087e+00 96
2016  9 1.53672e+01 1.14442e+01 189
2016 10 1.52582e+01 9.45292e+00 271
2016 11 1.37949e+01 5.96236e+00 176
2016 12 1.09871e+01 8.13951e+00 96
2017  1 8.75762e-01 1.71262e+00 192
2017  2 4.73382e+00 5.38484e+00 216
2017  3 1.01430e+01 9.42757e+00 189
2017  4 1.37131e+01 6.66415e+00 128
2017  5 1.65869e+01 6.29677e+00 160
2017  6 9.36516e+00 7.20654e+00 74
2017  7 4.97925e-01 1.04339e+00 79
2017  8 4.82293e+00 5.22580e+00 64
2017  9 1.34018e+01 1.13255e+01 171
2017 10 7.06011e+00 8.65135e+00 252
2017 11 9.55533e+00 8.58416e+00 256
2017 12 1.64011e+01 9.15898e+00 206
2018  1 1.16079e+01 4.58244e+00 224
2018  2 2.42813e+01 7.05612e+00 107
2018  3 6.71907e+00 7.66884e+00 145
2018  4 1.73132e+01 3.83344e+00 128
2018  5 8.87262e+00 1.30203e+01 107
2018  6 1.05802e+01 6.41992e+00 78
2018  7 1.46121e+01 8.13468e+00 76
2018  8 6.75436e+00 4.04101e+00 60
2018  9 1.18994e+01 1.12677e+01 176
2018 10 7.59933e+00 7.08921e+00 192
2018 11 5.98448e+00 6.37879e+00 85
2018 12 9.72152e-01 1.03381e+00 80
2019  1 1.91025e-01 3.20373e-01 224
2019  2 4.71534e+00 6.37422e+00 48
2019  3 8.09416e+00 6.47116e+00 178
2019  4 8.31894e+00 6.69785e+00 128
2019  5 6.98405e+00 6.55175e+00 155
2019  6 1.73883e+01 1.25227e+01 64
2019  7 1.16997e+01 8.20741e+00 111
2019  8 2.14544e+01 1.27957e+01 60
2019  9 1.16468e+01 1.00134e+01 250
2019 10 1.19368e+01 5.41125e+00 107
2019 11 1.37711e+01 7.29437e+00 144
2019 12 8.69079e+00 5.15785e+00 136
2020  1 2.31746e+00 3.08521e+00 111
2020  2 7.73728e+00 6.45042e+00 120
2020  3 3.44205e+00 4.92490e+00 107
2020  4 4.59351e+00 5.04771e+00 117
2020  5 7.62883e+00 6.65610e+00 93
2020  6 2.17308e+01 9.79373e+00 96
2020  7 1.55185e+01 1.35866e+01 80
2020  8 1.63212e+01 1.47818e+01 112
2020  9 2.30682e+00 3.32958e+00 47
2020 10 3.16205e+00 4.20733e+00 165
2020 11 3.35509e+00 3.83063e+00 240
2020 12 6.31678e+00 6.71951e+00 200
2021  1 3.65166e+00 5.06041e+00 159
2021  2 1.18425e+01 6.47266e+00 128
2021  3 1.20492e+01 6.28676e+00 94
2021  4 8.33909e+00 7.83029e+00 177
2021  5 5.87197e+00 6.27412e+00 80
2021  6 1.75924e+01 1.33628e+01 37
2021  7 4.73143e+00 4.44998e+00 30
2021  8 4.70919e+00 4.63651e+00 80
2021  9 8.16946e-01 1.72426e+00 110
2021 10 9.37271e-01 1.95941e+00 122
2021 11 3.20166e+00 4.25458e+00 259
2021 12 7.39403e+00 6.72170e+00 119
2022  1 6.58123e+00 5.69622e+00 165
2022  2 1.02753e+01 7.96376e+00 192
2022  3 1.75334e+01 8.26020e+00 192
2022  4 6.40073e+00 6.92476e+00 48
2022  5 1.13954e+01 4.39845e+00 128
2022  6 1.03648e+01 8.60092e+00 80
2022  7 2.76708e+01 7.66437e+00 140
2022  8 2.54402e+01 1.61891e+01 111
2022  9 1.51336e+01 1.35461e+01 208
2022 10 1.33515e+01 7.71898e+00 304
2022 11 1.50749e+01 7.45539e+00 196
2022 12 6.92249e+00 4.18363e+00 128
2023  1 8.54458e+00 3.88792e+00 178
2023  2 1.12234e+01 6.41446e+00 159
2023  3 1.93618e+01 9.12667e+00 74
2023  4 1.98126e+01 6.75098e+00 64
2023  5 2.82589e+01 8.78940e+00 96
2023  6 1.78394e+01 8.21134e+00 64
2023  7 1.32033e+01 7.52138e+00 118
2023  8 1.72635e+01 7.12657e+00 176
2023  9 9.50406e+00 6.55803e+00 144
2023 10 1.54674e+01 8.97740e+00 224
2023 11 8.34993e+00 6.11585e+00 144
2023 12 1.25683e+01 6.61284e+00 130
2024  1 1.03912e+01 6.72347e+00 80
2024  2 1.18302e+01 7.60117e+00 128
2024  3 6.05589e+00 5.17061e+00 91
2024  4 5.04796e+00 3.33322e+00 32