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 2.13137e+01 3.42028e+00 126 2002 8 1.21192e+01 1.48982e+00 90 2002 9 1.02017e+01 5.75085e+00 104 2002 10 8.49470e+00 5.01741e+00 154 2002 11 2.65194e+00 1.61881e+00 160 2002 12 2.27267e+00 9.18547e-01 178 2003 1 1.89386e+00 1.39279e+00 179 2003 2 3.22014e+00 1.58548e+00 160 2003 3 2.87381e+00 3.36974e+00 127 2003 4 4.39042e+00 2.55342e+00 171 2003 5 1.36385e+01 3.27592e+00 96 2003 6 2.93564e+00 2.04399e+00 32 2003 7 1.01529e+01 2.91836e+00 49 2003 8 6.59090e+00 2.73615e+00 109 2003 9 2.11369e+00 2.11443e+00 90 2003 10 4.88251e+00 3.99071e+00 187 2003 11 1.02696e+01 4.80708e+00 207 2003 12 2.64652e+00 1.13490e+00 198 2004 1 5.42426e+00 1.60734e+00 138 2004 2 4.74339e+00 1.08710e+00 32 2004 3 6.66934e+00 2.93749e+00 162 2004 4 1.00708e+01 6.62129e+00 145 2004 5 1.61669e+01 3.29435e+00 208 2004 6 1.39359e+01 1.33525e+00 80 2004 7 5.33419e+00 1.18731e+00 48 2004 8 1.03880e+01 4.26545e+00 112 2004 9 3.78724e+00 5.47997e+00 149 2004 10 4.36795e+00 2.43700e+00 100 2004 11 4.20090e+00 3.00267e+00 144 2004 12 7.81007e-01 4.35730e-01 128 2005 1 2.32136e+00 1.37419e+00 156 2005 2 3.22023e+00 2.13063e+00 148 2005 3 3.78837e+00 1.84576e+00 144 2005 4 4.91762e+00 1.81159e+00 128 2005 5 8.50570e+00 2.61424e+00 176 2005 6 9.85361e+00 5.13525e+00 96 2005 7 7.74669e+00 7.26981e+00 103 2005 8 1.62505e+01 8.72531e-01 48 2005 9 7.09393e-01 1.46844e+00 145 2005 10 3.91719e+00 2.05106e+00 196 2005 11 5.26267e+00 4.33023e+00 224 2005 12 3.06713e+00 1.28772e+00 126 2006 1 1.93423e+00 1.16924e+00 208 2006 2 1.71904e+00 3.02653e+00 168 2006 3 7.28754e+00 3.65190e+00 212 2006 4 1.81512e+01 5.27339e+00 160 2006 5 1.34645e+01 4.34182e+00 171 2006 6 1.23107e+01 5.70014e+00 176 2006 7 1.82174e+01 2.18095e+00 64 2006 8 1.34064e+01 4.36767e+00 131 2006 9 1.05696e+01 3.13003e+00 176 2006 10 1.01022e+01 5.67328e+00 217 2006 11 2.40569e+00 1.87348e+00 224 2006 12 5.20923e+00 3.43044e+00 160 2007 1 2.83403e+00 1.23451e+00 128 2007 2 3.10769e+00 1.59436e+00 160 2007 3 6.98298e+00 4.67445e+00 269 2007 4 1.00631e+01 8.46542e+00 181 2007 5 1.81366e+01 4.14883e+00 142 2007 6 1.54387e+01 4.13151e+00 128 2007 7 1.63686e+01 4.74777e+00 96 2007 8 1.58103e+01 1.72189e+00 127 2007 9 7.84755e+00 2.43388e+00 96 2007 10 4.09250e+00 1.88049e+00 160 2007 11 2.60001e+00 1.02676e+00 224 2007 12 8.75057e+00 3.18210e+00 112 2008 1 3.09058e+00 2.54434e+00 174 2008 2 6.19070e+00 3.13764e+00 241 2008 3 3.64202e+00 1.75598e+00 160 2008 4 9.28652e+00 3.76497e+00 144 2008 5 9.27038e+00 3.80434e+00 144 2008 6 5.78459e+00 2.39620e+00 164 2008 7 2.45175e+00 1.73400e+00 80 2008 8 6.10186e+00 1.15198e+00 74 2008 9 3.07030e+00 2.58519e+00 144 2008 10 1.53965e+00 1.00134e+00 208 2008 11 2.87688e+00 1.43840e+00 208 2008 12 5.71587e+00 3.61209e+00 103 2009 1 1.90458e+00 1.22816e+00 160 2009 2 1.94376e+00 1.89974e+00 167 2009 3 6.25625e+00 4.30853e+00 144 2009 4 7.81796e+00 3.71347e+00 116 2009 5 9.57419e+00 5.77430e+00 80 2009 6 5.00997e+00 1.95578e+00 128 2009 7 1.17087e+01 1.56492e+00 37 2009 8 1.13930e+01 7.06956e-01 80 2009 9 1.18088e+01 1.86338e+00 110 2009 10 7.89580e+00 4.82238e+00 166 2009 11 4.33021e+00 3.64166e+00 159 2009 12 2.03851e+00 1.05094e+00 64 2010 1 2.47009e+00 1.03081e+00 192 2010 2 7.77624e-01 7.29033e-01 128 2010 3 1.89778e+00 1.54322e+00 148 2010 4 2.52209e+00 2.44441e+00 195 2010 5 7.04161e+00 1.75491e+00 162 2010 6 8.21240e+00 2.08041e+00 144 2010 7 1.30241e+01 3.15554e+00 64 2010 8 1.18976e+01 1.91381e+00 35 2010 9 8.11140e+00 2.49597e+00 243 2010 10 9.52438e+00 1.97590e+00 323 2010 11 6.57989e+00 1.76844e+00 272 2010 12 2.00714e+00 1.28615e+00 176 2011 1 1.39210e+00 1.29851e+00 176 2011 2 2.63544e+00 2.52833e+00 176 2011 3 1.22596e+01 4.34902e+00 192 2011 4 1.26623e+01 2.74329e+00 176 2011 5 1.11255e+01 3.60496e+00 208 2011 6 4.50678e+00 3.45877e+00 127 2011 7 6.60438e+00 1.85384e+00 128 2011 8 4.94906e+00 2.61453e+00 215 2011 9 5.01729e+00 1.86142e+00 160 2011 10 4.53187e+00 1.98838e+00 278 2011 11 4.92210e+00 1.96074e+00 207 2011 12 5.58587e+00 1.32042e+00 131 2012 1 4.76002e+00 2.57920e+00 240 2012 2 3.36391e+00 3.42542e-01 32 2012 3 1.27591e+01 5.24558e+00 183 2012 4 1.59866e+01 3.97586e+00 176 2012 5 2.16883e+01 2.41363e+00 176 2012 6 1.26881e+01 9.92931e+00 128 2012 7 1.87029e+01 2.32938e+00 48 2012 8 6.86162e+00 8.78601e-01 48 2012 9 6.09006e+00 2.58495e+00 101 2012 10 9.32975e+00 4.36498e+00 224 2012 11 4.70446e+00 3.24354e+00 304 2012 12 7.56893e+00 2.36319e+00 80 2013 1 6.60844e+00 2.05705e+00 124 2013 2 6.89593e+00 1.80090e+00 64 2013 3 8.80469e-01 8.60687e-01 164 2013 4 5.29020e+00 1.81490e+00 48 2013 5 1.09654e+01 2.32868e+00 174 2013 6 1.36539e+01 2.79772e+00 80 2013 7 5.70110e+00 3.29803e+00 91 2013 8 5.81527e+00 3.23653e+00 128 2013 9 5.81173e+00 2.48456e+00 235 2013 10 5.94618e+00 3.19752e+00 193 2013 11 4.06698e+00 1.87829e+00 112 2013 12 5.28395e+00 1.19576e+00 104 2014 1 4.63901e+00 2.29100e+00 96 2014 2 2.49526e+00 1.94712e+00 112 2014 3 4.46931e+00 9.60292e-01 161 2014 4 4.19388e+00 3.86003e+00 100 2014 5 1.61521e+00 1.17170e+00 144 2014 6 8.79981e+00 3.36004e+00 112 2014 7 7.04831e+00 4.55120e+00 102 2014 8 1.32844e+01 1.74177e+00 146 2014 9 1.53533e+01 1.93408e+00 128 2014 10 1.04062e+01 2.37518e+00 267 2014 11 3.52014e+00 2.17629e+00 208 2014 12 4.55102e+00 1.80873e+00 192 2015 1 3.90436e+00 2.91230e+00 158 2015 2 4.72292e+00 1.99406e+00 173 2015 3 8.82280e+00 4.15612e+00 176 2015 4 7.90595e+00 1.62583e+00 48 2015 5 1.14841e+01 1.57546e+00 169 2015 6 1.52788e+01 4.19271e+00 163 2015 7 8.78119e+00 3.69086e+00 124 2015 8 1.40696e+01 2.47849e+00 128 2015 9 5.37546e+00 5.83051e+00 96 2015 10 4.44602e+00 2.76349e+00 162 2015 11 3.90183e+00 2.38523e+00 174 2015 12 3.99400e+00 3.33382e+00 141 2016 1 2.73804e+00 1.14347e+00 141 2016 2 1.74090e+00 1.84823e+00 238 2016 3 3.97075e+00 2.76321e+00 104 2016 4 2.70321e+00 2.03614e+00 128 2016 5 8.94003e+00 3.41592e+00 176 2016 6 9.17669e+00 6.46251e+00 128 2016 7 1.34136e+00 1.53731e+00 105 2016 8 1.01499e+01 1.63502e+00 64 2016 9 1.21680e+01 4.72268e+00 172 2016 10 9.44829e+00 2.76649e+00 288 2016 11 7.90838e+00 2.71366e+00 252 2016 12 7.81194e+00 1.83299e+00 236 2017 1 3.84238e+00 3.35105e+00 161 2017 2 2.38201e+00 1.54850e+00 270 2017 3 7.77693e+00 3.45773e+00 176 2017 4 6.07823e+00 2.03368e+00 96 2017 5 1.00296e+01 8.03478e+00 111 2017 6 8.86090e+00 2.16400e+00 30 2017 7 6.63737e+00 4.07589e+00 96 2017 8 9.26120e+00 4.38524e+00 64 2017 9 4.63968e+00 2.25353e+00 207 2017 10 2.75626e+00 1.45801e+00 208 2017 11 5.66720e+00 3.65163e+00 207 2017 12 3.45549e+00 1.10867e+00 116 2018 1 2.34861e+00 1.57818e+00 176 2018 2 1.48918e+01 5.52194e+00 112 2018 3 1.02859e+01 3.71694e+00 202 2018 4 1.38218e+01 4.62496e+00 178 2018 5 1.16818e+01 2.38264e+00 144 2018 6 1.01438e+01 3.04194e+00 96 2018 7 9.30867e+00 1.42132e+00 96 2018 8 8.57194e+00 1.99313e+00 96 2018 9 1.00917e+01 6.16008e+00 196 2018 10 4.69356e+00 6.73512e+00 228 2018 11 1.62174e+00 2.30391e+00 100 2018 12 1.77163e+00 1.33094e+00 80 2019 1 1.68701e+00 3.53086e+00 194 2019 2 1.92879e+00 9.63169e-01 64 2019 3 1.54417e+00 1.35952e+00 192 2019 4 6.06046e+00 2.05284e+00 96 2019 5 1.07442e+01 2.83375e+00 206 2019 6 6.18627e+00 4.14678e+00 80 2019 7 4.49326e+00 2.06161e+00 89 2019 8 8.25448e+00 2.72808e+00 106 2019 9 5.07543e+00 3.02325e+00 288 2019 10 8.48965e+00 3.82475e+00 112 2019 11 2.51794e+00 1.37696e+00 195 2019 12 4.78397e+00 2.73195e+00 100 2020 1 4.06612e+00 2.32102e+00 160 2020 2 1.96438e+00 1.22228e+00 128 2020 3 1.23130e+01 6.64753e+00 237 2020 4 3.99430e+00 1.58765e+00 144 2020 5 2.89149e+00 2.22160e+00 96 2020 6 1.07675e+01 2.06411e+00 104 2020 7 9.29454e+00 2.11165e+00 39 2020 8 1.29908e+01 1.88105e+00 66 2020 9 1.21419e+00 1.31175e+00 101 2020 10 1.34999e+00 1.67652e+00 185 2020 11 7.84803e-01 7.11880e-01 256 2020 12 2.60069e+00 1.42994e+00 208 2021 1 3.33644e+00 2.27488e+00 128 2021 2 2.34847e+00 1.84854e+00 96 2021 3 6.08938e+00 2.95499e+00 112 2021 4 1.07425e+01 2.91812e+00 192 2021 5 1.19756e+01 2.84821e+00 128 2021 6 1.09611e+01 2.71473e+00 64 2021 7 1.24867e+01 3.17516e+00 128 2021 8 7.80102e+00 2.02052e+00 112 2021 9 2.01737e+00 1.07142e+00 100 2021 10 5.51605e+00 6.24009e+00 163 2021 11 2.70289e+00 1.28644e+00 192 2021 12 4.12975e+00 1.64415e+00 118 2022 1 3.36827e+00 3.05543e+00 208 2022 2 6.56268e+00 5.06989e+00 160 2022 3 9.93554e+00 3.46496e+00 240 2022 4 1.77124e+01 1.81383e+00 59 2022 5 1.70095e+01 6.86563e+00 99 2022 6 2.26972e+01 4.37335e+00 165 2022 7 1.10949e+01 2.21463e+00 96 2022 8 4.91035e+00 1.80918e+00 136 2022 9 8.48506e+00 2.59158e+00 144 2022 10 6.26461e+00 3.09386e+00 272 2022 11 9.25173e+00 3.37581e+00 96 2022 12 8.55725e+00 2.22771e+00 160 2023 1 6.55559e+00 2.56627e+00 224 2023 2 7.77706e+00 4.25238e+00 195 2023 3 6.09007e+00 1.77116e+00 162 2023 4 1.24885e+01 3.84790e+00 96 2023 5 1.44223e+01 3.26741e+00 128 2023 6 1.51179e+01 3.14837e+00 66 2023 7 1.02344e+01 2.50606e+00 80 2023 8 3.85638e+00 3.32737e+00 168 2023 9 3.96204e+00 1.90328e+00 124 2023 10 5.13684e+00 5.34362e+00 224 2023 11 3.32873e+00 1.53627e+00 145 2023 12 2.44640e+00 1.32547e+00 92 2024 1 2.40335e+00 1.73725e+00 126 2024 2 1.83608e+00 9.73959e-01 128 2024 3 5.58821e+00 2.75221e+00 84 2024 4 nan nan 0