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 1.83174e+01 6.46894e+00 69 2002 8 2.09042e+01 5.01138e+00 64 2002 9 7.32638e+00 6.36164e+00 90 2002 10 7.93918e+00 7.64388e+00 163 2002 11 3.82833e+00 3.25798e+00 199 2002 12 2.37898e+00 2.66024e+00 192 2003 1 4.90385e+00 5.15554e+00 240 2003 2 8.48545e+00 5.19131e+00 173 2003 3 2.14017e+00 2.28300e+00 80 2003 4 6.33789e+00 4.25937e+00 144 2003 5 6.39507e+00 4.66279e+00 51 2003 6 1.50007e+01 8.81048e+00 96 2003 7 4.86040e+00 5.87711e+00 60 2003 8 6.64234e+00 4.18743e+00 64 2003 9 5.68265e+00 6.79931e+00 128 2003 10 5.30172e+00 5.51575e+00 224 2003 11 3.14765e+00 2.74051e+00 271 2003 12 2.39316e+00 2.40003e+00 161 2004 1 7.35104e+00 5.63061e+00 176 2004 2 8.31018e-01 7.46051e-01 48 2004 3 1.23629e+01 3.80496e+00 192 2004 4 1.32070e+01 5.23398e+00 164 2004 5 1.58749e+01 8.88847e+00 192 2004 6 2.16311e+01 9.22061e+00 76 2004 7 1.89306e+01 5.63304e+00 96 2004 8 1.83817e+01 8.06612e+00 112 2004 9 4.88922e+00 5.09064e+00 64 2004 10 9.29983e+00 8.24297e+00 110 2004 11 3.58446e+00 4.44775e+00 201 2004 12 4.20138e-01 8.47645e-01 151 2005 1 2.84233e+00 2.69635e+00 160 2005 2 5.35196e+00 4.80515e+00 143 2005 3 4.88280e+00 4.52445e+00 221 2005 4 1.73453e+00 1.98913e+00 176 2005 5 8.31400e+00 5.51627e+00 176 2005 6 1.07977e+01 3.32730e+00 64 2005 7 4.57973e+00 3.83408e+00 104 2005 8 9.34291e+00 6.45561e+00 91 2005 9 8.82127e+00 5.61149e+00 80 2005 10 5.40541e+00 5.54692e+00 292 2005 11 6.68281e+00 6.95953e+00 261 2005 12 2.47553e+00 2.23751e+00 170 2006 1 2.35439e+00 2.47931e+00 180 2006 2 5.05957e+00 6.70060e+00 200 2006 3 9.43944e+00 5.02308e+00 250 2006 4 1.77971e+01 9.79757e+00 191 2006 5 2.08981e+01 6.11806e+00 160 2006 6 1.56578e+01 7.37299e+00 117 2006 7 2.01844e+01 7.59835e+00 96 2006 8 1.84353e+01 4.14554e+00 141 2006 9 1.42108e+01 5.41478e+00 176 2006 10 8.24298e+00 6.92399e+00 177 2006 11 4.91362e+00 4.84445e+00 247 2006 12 6.23320e+00 6.30787e+00 142 2007 1 7.77218e+00 6.08225e+00 98 2007 2 5.98294e+00 4.08503e+00 176 2007 3 1.34215e+01 5.79343e+00 298 2007 4 1.30633e+01 6.91157e+00 160 2007 5 1.17627e+01 6.73256e+00 112 2007 6 1.82842e+01 7.22333e+00 96 2007 7 1.73170e+01 4.25273e+00 145 2007 8 1.81043e+01 5.82845e+00 112 2007 9 6.01368e+00 3.83938e+00 115 2007 10 8.69031e+00 6.69769e+00 149 2007 11 6.31323e+00 3.81426e+00 284 2007 12 9.85720e+00 8.21974e+00 164 2008 1 3.38672e+00 3.65370e+00 204 2008 2 7.98957e+00 5.48224e+00 240 2008 3 5.50495e+00 4.79789e+00 176 2008 4 1.21000e+01 7.07331e+00 176 2008 5 1.74113e+01 7.46647e+00 176 2008 6 2.15054e+01 5.26135e+00 112 2008 7 2.55026e+01 4.60351e+00 80 2008 8 2.80642e+01 1.75512e+00 48 2008 9 3.92302e+00 3.92672e+00 128 2008 10 6.72674e+00 4.89330e+00 272 2008 11 5.29769e+00 4.82963e+00 281 2008 12 8.98851e-01 8.88415e-01 199 2009 1 4.11387e+00 4.44743e+00 155 2009 2 1.11170e+01 3.79602e+00 208 2009 3 8.50691e+00 7.09545e+00 192 2009 4 5.33176e+00 4.58050e+00 160 2009 5 1.20735e+01 5.73879e+00 160 2009 6 2.74616e+01 4.45135e+00 80 2009 7 2.18286e+01 6.03901e+00 56 2009 8 2.14327e+01 1.03211e+01 97 2009 9 1.27812e+01 8.06490e+00 96 2009 10 7.31137e+00 7.07311e+00 238 2009 11 4.71954e+00 3.24317e+00 196 2009 12 1.31354e+00 7.80156e-01 64 2010 1 1.84647e+00 2.00533e+00 161 2010 2 2.35272e+00 2.61514e+00 183 2010 3 4.63507e+00 3.35498e+00 167 2010 4 8.76356e+00 5.29646e+00 223 2010 5 7.76704e+00 4.14205e+00 117 2010 6 1.49207e+01 7.57046e+00 118 2010 7 1.87535e+01 8.08114e+00 73 2010 8 2.29957e+01 4.96978e+00 128 2010 9 1.33181e+01 7.30592e+00 171 2010 10 1.48565e+01 7.76009e+00 304 2010 11 9.39345e+00 6.95480e+00 289 2010 12 3.91286e+00 3.24139e+00 212 2011 1 1.47141e+00 2.69915e+00 214 2011 2 1.38684e+01 3.39620e+00 176 2011 3 1.46957e+01 8.36070e+00 174 2011 4 1.37927e+01 7.61245e+00 144 2011 5 2.03288e+01 7.98504e+00 210 2011 6 2.01868e+01 4.81112e+00 185 2011 7 2.02498e+01 8.15613e+00 127 2011 8 2.31620e+01 4.98116e+00 144 2011 9 1.50971e+01 8.95469e+00 144 2011 10 8.24024e+00 6.91346e+00 288 2011 11 4.09105e+00 4.18150e+00 233 2011 12 2.02304e+00 2.93716e+00 240 2012 1 4.56929e+00 4.76688e+00 196 2012 2 3.99313e+00 4.17101e+00 38 2012 3 1.02473e+01 7.01322e+00 233 2012 4 1.62297e+01 7.91846e+00 208 2012 5 2.01453e+01 7.71611e+00 176 2012 6 9.55081e+00 5.61841e+00 112 2012 7 1.64982e+01 4.93229e+00 64 2012 8 1.34407e+01 1.00316e+01 80 2012 9 6.71216e+00 5.07617e+00 95 2012 10 1.65594e+00 2.21168e+00 217 2012 11 7.84932e+00 5.81041e+00 288 2012 12 8.20113e+00 5.39445e+00 80 2013 1 6.36562e+00 6.19071e+00 149 2013 2 1.07564e+00 1.19887e+00 128 2013 3 5.33425e+00 4.96182e+00 231 2013 4 3.92466e+00 3.52935e+00 48 2013 5 1.39245e+01 7.88479e+00 160 2013 6 1.18036e+01 6.97144e+00 80 2013 7 5.16179e+00 4.85191e+00 60 2013 8 1.33322e+01 1.42460e+01 119 2013 9 1.00848e+01 6.68045e+00 167 2013 10 5.48895e+00 5.29510e+00 240 2013 11 1.23119e+00 1.17324e+00 78 2013 12 7.07728e+00 4.91566e+00 192 2014 1 4.69867e+00 3.52113e+00 128 2014 2 1.05431e+01 5.02954e+00 144 2014 3 4.44556e+00 2.55341e+00 160 2014 4 6.33776e+00 4.47619e+00 128 2014 5 6.07106e+00 5.56722e+00 144 2014 6 1.47084e+01 5.66530e+00 145 2014 7 2.04401e+01 3.83073e+00 96 2014 8 2.53556e+01 6.95519e+00 121 2014 9 1.55885e+01 1.12232e+01 122 2014 10 1.14523e+01 8.07715e+00 285 2014 11 5.17704e+00 5.94478e+00 240 2014 12 7.98166e+00 4.23459e+00 176 2015 1 1.02806e+00 1.05189e+00 202 2015 2 2.66826e+00 2.79300e+00 256 2015 3 4.88113e+00 2.95774e+00 128 2015 4 1.68188e+01 1.54287e+00 48 2015 5 1.49893e+01 8.00084e+00 152 2015 6 1.24546e+01 7.24886e+00 99 2015 7 2.36990e+01 7.06821e+00 75 2015 8 1.72446e+01 7.17914e+00 127 2015 9 1.43665e+01 4.30018e+00 80 2015 10 1.21803e+01 9.24720e+00 192 2015 11 6.47554e+00 6.04722e+00 228 2015 12 4.31844e+00 3.53561e+00 176 2016 1 6.75353e-01 9.51097e-01 139 2016 2 2.26169e+00 3.66927e+00 256 2016 3 6.70409e+00 4.44830e+00 192 2016 4 5.83292e+00 5.44042e+00 95 2016 5 1.64068e+01 4.46068e+00 131 2016 6 1.70489e+01 8.21135e+00 151 2016 7 2.08478e+01 7.82616e+00 171 2016 8 1.16584e+01 6.05226e+00 124 2016 9 7.83090e+00 5.45723e+00 145 2016 10 5.89708e+00 5.32815e+00 304 2016 11 1.15155e+01 6.93672e+00 256 2016 12 7.21723e+00 5.88175e+00 218 2017 1 5.07200e+00 4.85047e+00 184 2017 2 4.93015e+00 4.45212e+00 318 2017 3 8.53008e+00 7.24504e+00 201 2017 4 1.25357e+01 7.74761e+00 144 2017 5 1.38580e+01 6.57692e+00 129 2017 6 1.39748e+01 4.63537e+00 71 2017 7 1.43301e+01 9.79508e+00 112 2017 8 1.59983e+01 3.46373e+00 86 2017 9 1.47822e+01 5.76418e+00 176 2017 10 4.23157e+00 3.49452e+00 199 2017 11 1.11458e+01 6.73279e+00 304 2017 12 3.85979e+00 5.76485e+00 144 2018 1 2.13723e+00 1.98874e+00 165 2018 2 1.18056e+01 5.78007e+00 144 2018 3 1.10274e+01 7.35267e+00 232 2018 4 1.52416e+01 6.35993e+00 160 2018 5 1.68963e+01 6.08698e+00 130 2018 6 1.86075e+01 5.43170e+00 123 2018 7 1.72663e+01 9.66410e+00 124 2018 8 2.28500e+01 1.09494e+01 43 2018 9 1.22755e+01 6.71516e+00 157 2018 10 1.54050e+00 1.69837e+00 240 2018 11 2.68095e+00 2.90079e+00 112 2018 12 3.76627e-01 4.16011e-01 123 2019 1 6.99159e-01 6.65615e-01 208 2019 2 2.93336e+00 1.47655e+00 48 2019 3 4.70521e+00 2.94378e+00 240 2019 4 2.47333e+00 1.86752e+00 128 2019 5 1.29438e+01 5.47500e+00 222 2019 6 1.83043e+01 1.00662e+01 144 2019 7 2.21943e+01 6.72468e+00 113 2019 8 1.82834e+01 6.48339e+00 125 2019 9 8.52687e+00 8.13820e+00 274 2019 10 1.11641e+01 8.87120e+00 134 2019 11 7.61188e+00 7.30191e+00 203 2019 12 1.39463e+00 2.08916e+00 108 2020 1 3.36541e+00 2.27273e+00 160 2020 2 2.23740e+00 4.12658e+00 131 2020 3 6.83618e+00 7.15818e+00 135 2020 4 5.81986e+00 5.84512e+00 153 2020 5 8.73159e+00 4.38451e+00 160 2020 6 9.44951e+00 5.57194e+00 77 2020 7 1.88783e+01 5.93369e+00 96 2020 8 2.54981e+01 2.66970e+00 48 2020 9 1.12082e+01 1.06974e+01 112 2020 10 2.77976e+00 2.45734e+00 192 2020 11 2.02381e+00 1.52567e+00 320 2020 12 1.14255e+00 1.43086e+00 304 2021 1 1.71307e+00 1.25881e+00 144 2021 2 4.88572e+00 2.98047e+00 113 2021 3 3.61362e+00 3.57624e+00 152 2021 4 6.02178e+00 3.27511e+00 160 2021 5 7.00376e+00 5.85941e+00 192 2021 6 2.58058e+01 3.07945e+00 64 2021 7 1.80576e+01 5.21641e+00 87 2021 8 1.37733e+01 8.75095e+00 127 2021 9 6.09352e+00 7.49796e+00 96 2021 10 4.37583e+00 5.06766e+00 146 2021 11 2.91785e+00 2.60692e+00 256 2021 12 4.56712e+00 2.97799e+00 144 2022 1 2.03520e+00 2.29267e+00 208 2022 2 7.86873e+00 5.15700e+00 170 2022 3 1.21065e+01 7.69602e+00 208 2022 4 6.71669e+00 1.95503e+00 64 2022 5 1.19238e+01 6.45060e+00 112 2022 6 1.99047e+01 5.41347e+00 176 2022 7 2.09114e+01 2.72581e+00 72 2022 8 1.85022e+01 4.11797e+00 96 2022 9 7.88899e+00 5.36179e+00 161 2022 10 1.47323e+01 4.56462e+00 312 2022 11 9.93348e+00 5.99494e+00 160 2022 12 5.65864e+00 6.47223e+00 188 2023 1 7.02305e+00 4.99619e+00 235 2023 2 9.76202e+00 8.09912e+00 172 2023 3 8.14184e+00 8.33066e+00 128 2023 4 1.71237e+01 7.83063e+00 112 2023 5 1.29778e+01 8.04202e+00 85 2023 6 1.97193e+01 8.85489e+00 128 2023 7 2.47457e+01 5.03546e+00 72 2023 8 1.84444e+01 9.89836e+00 144 2023 9 9.89601e+00 6.40610e+00 176 2023 10 3.31541e+00 3.96746e+00 208 2023 11 7.11784e+00 6.69487e+00 162 2023 12 3.79423e-01 4.14349e-01 98 2024 1 8.72479e-01 1.07392e+00 111 2024 2 7.49337e+00 5.57350e+00 128 2024 3 4.46199e+00 2.34753e+00 80 2024 4 nan nan 0