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 2.12118e+01 3.38592e+00 32 2002 8 1.12509e+01 4.66043e+00 48 2002 9 3.08045e+00 3.27977e+00 60 2002 10 7.09363e+00 4.06020e+00 165 2002 11 3.89234e+00 2.19151e+00 209 2002 12 1.55861e+00 1.64138e+00 163 2003 1 1.47804e+00 1.11949e+00 265 2003 2 2.96466e+00 2.29948e+00 176 2003 3 2.25242e+00 2.57859e+00 79 2003 4 5.10704e+00 3.92361e+00 174 2003 5 6.69550e+00 5.10979e+00 94 2003 6 4.66227e+00 1.74513e+00 64 2003 7 4.80577e+00 3.74902e+00 64 2003 8 3.36912e+00 2.93759e+00 48 2003 9 7.20035e+00 1.55292e+00 96 2003 10 6.18479e+00 3.67142e+00 192 2003 11 4.45075e+00 3.30293e+00 256 2003 12 9.78054e-01 7.09072e-01 176 2004 1 5.02215e+00 2.69375e+00 161 2004 2 4.70787e+00 1.82649e+00 64 2004 3 1.18597e+01 3.50564e+00 224 2004 4 1.28969e+01 6.66091e+00 144 2004 5 1.81544e+01 4.96320e+00 224 2004 6 2.50961e+01 2.28805e+00 80 2004 7 2.12936e+01 3.26836e+00 95 2004 8 1.87781e+01 2.11143e+00 80 2004 9 1.04097e+01 9.32682e+00 64 2004 10 6.14565e+00 3.14919e+00 128 2004 11 4.64789e+00 2.29086e+00 163 2004 12 2.25855e+00 1.84916e+00 119 2005 1 3.67026e+00 1.51197e+00 144 2005 2 6.80763e+00 2.31408e+00 144 2005 3 3.49319e+00 2.18430e+00 176 2005 4 7.07741e+00 4.05839e+00 160 2005 5 7.70444e+00 3.52201e+00 208 2005 6 7.20632e+00 4.12905e+00 137 2005 7 2.80411e+00 2.87654e+00 109 2005 8 1.31058e+00 1.76571e+00 107 2005 9 4.25290e-01 1.18084e+00 72 2005 10 3.31096e+00 2.66053e+00 240 2005 11 8.15964e+00 3.13422e+00 218 2005 12 5.42661e+00 3.86657e+00 175 2006 1 2.54281e+00 2.54693e+00 192 2006 2 2.66147e+00 1.87264e+00 170 2006 3 8.50698e+00 1.37261e+00 224 2006 4 1.44591e+01 2.69651e+00 188 2006 5 1.97643e+01 3.36622e+00 160 2006 6 2.33316e+01 6.39084e+00 144 2006 7 2.22277e+01 2.84982e+00 112 2006 8 2.21392e+01 3.40919e+00 160 2006 9 9.70136e+00 3.91740e+00 175 2006 10 7.60863e+00 2.77222e+00 224 2006 11 5.12089e+00 2.81392e+00 211 2006 12 5.18286e+00 3.63771e+00 128 2007 1 7.12259e+00 2.42825e+00 140 2007 2 7.86410e+00 3.44306e+00 160 2007 3 1.48017e+01 6.30186e+00 325 2007 4 9.83525e+00 5.35203e+00 201 2007 5 1.53202e+01 2.09002e+00 144 2007 6 1.68023e+01 3.00441e+00 96 2007 7 1.77869e+01 2.90229e+00 96 2007 8 1.38592e+01 4.93592e+00 128 2007 9 9.57231e+00 2.99935e+00 102 2007 10 4.52213e+00 1.38209e+00 96 2007 11 6.71029e+00 2.99291e+00 256 2007 12 1.20129e+01 4.08358e+00 170 2008 1 6.14826e+00 4.83586e+00 192 2008 2 7.50541e+00 2.30342e+00 208 2008 3 4.87882e+00 3.81543e+00 192 2008 4 1.24677e+01 2.11957e+00 192 2008 5 1.49074e+01 2.16378e+00 160 2008 6 1.74454e+01 3.22884e+00 128 2008 7 1.19241e+01 3.57869e+00 96 2008 8 1.68105e+01 3.34098e+00 79 2008 9 5.88025e+00 6.36629e+00 133 2008 10 6.60365e+00 3.07302e+00 264 2008 11 6.34157e+00 2.52289e+00 274 2008 12 1.92675e+00 2.07745e+00 229 2009 1 3.65798e+00 3.33094e+00 192 2009 2 5.04774e+00 3.75608e+00 240 2009 3 1.22712e+01 6.23913e+00 208 2009 4 1.07373e+01 5.54016e+00 144 2009 5 1.05051e+01 1.84118e+00 93 2009 6 1.43570e+01 2.44104e+00 80 2009 7 2.19656e+01 4.71717e+00 67 2009 8 1.56539e+01 6.48331e+00 85 2009 9 1.64498e+01 3.04601e+00 69 2009 10 7.99062e+00 4.37487e+00 153 2009 11 4.08254e+00 2.31326e+00 208 2009 12 1.21454e+00 1.81580e-01 48 2010 1 1.46404e+00 9.25977e-01 160 2010 2 2.20970e+00 1.70552e+00 207 2010 3 1.07080e+00 9.90580e-01 202 2010 4 4.52245e+00 3.34334e+00 187 2010 5 7.84603e+00 7.33419e+00 107 2010 6 1.06122e+01 3.95557e+00 160 2010 7 1.78232e+01 2.01458e+00 64 2010 8 2.05200e+01 1.87516e+00 114 2010 9 1.92075e+01 2.78594e+00 145 2010 10 1.46149e+01 2.00018e+00 351 2010 11 9.74104e+00 3.26187e+00 304 2010 12 3.08272e+00 2.97005e+00 256 2011 1 1.82664e+00 1.77236e+00 192 2011 2 5.41131e+00 3.00275e+00 208 2011 3 9.44266e+00 3.73081e+00 208 2011 4 1.80014e+01 5.24800e+00 216 2011 5 1.34061e+01 3.34441e+00 224 2011 6 7.43195e+00 6.56346e+00 128 2011 7 1.32394e+01 2.23921e+00 82 2011 8 1.47433e+01 3.25314e+00 153 2011 9 1.13998e+01 5.47168e+00 143 2011 10 7.37012e+00 3.43283e+00 240 2011 11 5.82255e+00 2.21405e+00 223 2011 12 1.85632e+00 1.30999e+00 192 2012 1 2.35742e+00 2.54893e+00 256 2012 2 1.51313e+00 1.09607e+00 48 2012 3 1.21073e+01 7.67772e+00 216 2012 4 2.00285e+01 8.34718e+00 205 2012 5 1.73799e+01 2.25331e+00 128 2012 6 8.56467e+00 7.80991e+00 80 2012 7 1.84449e+01 1.83721e+00 104 2012 8 1.76336e+01 2.05652e+00 96 2012 9 4.34218e+00 2.55541e+00 61 2012 10 7.13761e+00 5.27683e+00 240 2012 11 3.04316e+00 2.21631e+00 256 2012 12 5.67569e+00 4.60698e+00 152 2013 1 3.99853e+00 2.96672e+00 192 2013 2 4.19424e+00 3.49195e+00 176 2013 3 3.01107e+00 1.86265e+00 208 2013 4 6.92492e+00 1.73770e+00 80 2013 5 1.35929e+01 4.07872e+00 128 2013 6 1.40418e+01 4.95415e+00 91 2013 7 3.74959e+00 4.03857e-01 29 2013 8 1.17780e+01 3.06325e+00 81 2013 9 4.56438e+00 4.01722e+00 115 2013 10 6.44450e+00 5.63685e+00 200 2013 11 5.11652e+00 2.54467e+00 128 2013 12 3.04583e+00 1.50172e+00 160 2014 1 5.24526e+00 2.00266e+00 120 2014 2 9.50005e+00 3.03917e+00 160 2014 3 1.22707e+01 3.42572e+00 178 2014 4 6.97967e+00 5.68599e+00 144 2014 5 8.70541e+00 5.86232e+00 144 2014 6 8.16095e+00 5.50689e+00 140 2014 7 1.23538e+01 3.63478e+00 96 2014 8 1.50252e+01 1.82350e+00 202 2014 9 1.49013e+01 2.84411e+00 65 2014 10 3.44292e+00 1.71910e+00 259 2014 11 4.63122e+00 3.87158e+00 224 2014 12 2.96264e+00 1.08067e+00 184 2015 1 3.25018e+00 2.18064e+00 208 2015 2 5.62157e+00 2.66054e+00 188 2015 3 1.52418e+01 3.15536e+00 112 2015 4 9.75038e+00 2.48662e+00 64 2015 5 2.00978e+01 7.24685e+00 169 2015 6 2.16249e+01 4.45335e+00 144 2015 7 1.87834e+01 4.39663e+00 80 2015 8 1.63016e+01 1.67394e+00 112 2015 9 1.01666e+01 2.89128e+00 84 2015 10 8.17994e+00 2.14632e+00 224 2015 11 7.83891e+00 3.54633e+00 192 2015 12 9.81148e+00 2.26711e+00 128 2016 1 5.19702e+00 4.53520e+00 148 2016 2 1.56755e+00 1.77634e+00 272 2016 3 5.89559e+00 1.59161e+00 151 2016 4 1.13717e+01 5.29850e+00 117 2016 5 1.00805e+01 3.82833e+00 160 2016 6 2.02601e+01 2.24465e+00 146 2016 7 1.83896e+01 5.40175e+00 154 2016 8 1.78865e+01 1.26603e+00 123 2016 9 9.88658e+00 5.90127e+00 144 2016 10 1.34249e+01 2.21616e+00 298 2016 11 9.14738e+00 2.76646e+00 224 2016 12 5.16466e+00 1.58469e+00 192 2017 1 2.60678e+00 2.24649e+00 133 2017 2 5.31103e+00 3.21327e+00 304 2017 3 4.62173e+00 5.66441e+00 259 2017 4 1.16171e+01 4.56453e+00 136 2017 5 1.67708e+01 7.77557e+00 173 2017 6 8.93624e+00 3.65552e+00 80 2017 7 1.28626e+01 2.64900e+00 119 2017 8 9.70313e+00 2.84417e+00 116 2017 9 1.08991e+01 3.72570e+00 173 2017 10 7.31201e+00 2.70034e+00 181 2017 11 6.18703e+00 3.39438e+00 274 2017 12 4.76343e+00 2.52321e+00 112 2018 1 2.71362e+00 2.24820e+00 224 2018 2 1.47678e+01 5.12410e+00 96 2018 3 1.09949e+01 5.26115e+00 256 2018 4 1.28342e+01 2.24939e+00 152 2018 5 1.39179e+01 6.33644e+00 118 2018 6 1.52610e+01 2.96367e+00 128 2018 7 1.48011e+01 4.77019e+00 96 2018 8 1.10123e+01 6.85302e+00 48 2018 9 1.34254e+01 6.37566e+00 210 2018 10 2.61137e+00 3.18821e+00 224 2018 11 1.60258e+00 8.55299e-01 98 2018 12 7.19129e-01 1.08593e+00 128 2019 1 3.03303e-01 5.45157e-01 208 2019 2 2.58699e+00 3.94764e-01 64 2019 3 7.70416e+00 2.72037e+00 192 2019 4 9.16871e+00 4.24955e+00 114 2019 5 1.96346e+01 4.97962e+00 208 2019 6 1.50512e+01 3.17273e+00 64 2019 7 1.70813e+01 1.53960e+00 96 2019 8 1.55881e+01 3.45585e+00 133 2019 9 1.81602e+01 3.90540e+00 271 2019 10 8.26623e+00 5.43837e+00 183 2019 11 6.30436e+00 2.13163e+00 176 2019 12 3.71524e+00 1.24286e+00 144 2020 1 6.74509e+00 3.48767e+00 193 2020 2 3.05045e+00 2.55304e+00 144 2020 3 1.20544e+01 6.56159e+00 128 2020 4 1.65289e+01 4.44576e+00 144 2020 5 1.65936e+01 2.89205e+00 160 2020 6 1.73631e+01 5.23656e+00 128 2020 7 1.72786e+01 1.09300e+00 48 2020 8 1.89925e+01 1.29071e+00 64 2020 9 1.07721e+01 8.81607e+00 83 2020 10 3.51879e+00 1.47989e+00 176 2020 11 7.63922e+00 2.99530e+00 272 2020 12 1.59286e+00 1.13747e+00 240 2021 1 4.02589e+00 1.60845e+00 128 2021 2 4.25621e+00 2.63410e+00 112 2021 3 6.91139e+00 2.20539e+00 128 2021 4 1.27555e+01 6.47370e+00 201 2021 5 1.48804e+01 4.14015e+00 180 2021 6 1.44663e+01 1.00184e+00 73 2021 7 6.99971e+00 4.25103e+00 44 2021 8 4.02431e+00 4.14339e+00 112 2021 9 3.74374e+00 1.67398e+00 119 2021 10 3.19935e+00 3.60226e+00 161 2021 11 3.61000e+00 2.29465e+00 208 2021 12 4.73766e+00 2.55018e+00 156 2022 1 2.36747e+00 3.05974e+00 192 2022 2 8.92370e+00 5.77996e+00 176 2022 3 8.87215e+00 3.83875e+00 224 2022 4 1.87638e+01 1.52764e+00 79 2022 5 1.79863e+01 4.38013e+00 160 2022 6 1.70496e+01 4.14851e+00 208 2022 7 2.03214e+01 3.78335e+00 124 2022 8 1.21110e+01 3.92093e+00 94 2022 9 5.25684e+00 1.88405e+00 128 2022 10 5.88667e+00 1.67689e+00 272 2022 11 7.24760e+00 1.36181e+00 128 2022 12 5.36847e+00 4.60903e+00 180 2023 1 6.40186e+00 3.32745e+00 224 2023 2 6.88257e+00 6.85464e+00 192 2023 3 1.43215e+01 3.91788e+00 141 2023 4 2.10234e+01 5.77015e+00 126 2023 5 1.95503e+01 3.60933e+00 160 2023 6 2.06952e+01 2.27313e+00 96 2023 7 2.04007e+01 3.68301e+00 82 2023 8 1.44077e+01 6.72826e+00 145 2023 9 1.14229e+01 3.49358e+00 144 2023 10 5.94834e+00 2.85742e+00 177 2023 11 7.91227e+00 2.92697e+00 192 2023 12 2.72981e+00 8.14820e-01 64 2024 1 5.10998e+00 4.72297e+00 128 2024 2 3.92510e+00 3.16942e+00 160 2024 3 7.77330e+00 4.06182e+00 80 2024 4 nan nan 0