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 2.30276e+00 9.77446e-01 112 2002 8 3.71760e+00 1.50356e+00 110 2002 9 5.05479e+00 2.25383e+00 61 2002 10 8.39247e+00 4.94729e+00 112 2002 11 1.26963e+01 4.74200e+00 181 2002 12 1.05978e+01 6.51442e+00 171 2003 1 9.95982e+00 3.38780e+00 240 2003 2 6.04047e+00 1.67434e+00 160 2003 3 1.02025e+01 5.67584e+00 107 2003 4 8.65405e+00 4.77280e+00 124 2003 5 nan nan 0 2003 6 5.27402e+00 2.78628e+00 22 2003 7 9.15361e+00 7.01958e+00 64 2003 8 8.48929e+00 4.54157e+00 58 2003 9 1.43553e+01 1.07982e+01 119 2003 10 7.10960e+00 6.74278e+00 242 2003 11 3.79754e+00 1.42586e+00 286 2003 12 5.50354e+00 5.42082e+00 223 2004 1 4.45602e+00 9.39050e-01 142 2004 2 5.05193e+00 1.38920e+00 64 2004 3 5.18819e+00 7.14047e+00 192 2004 4 3.27177e+00 1.64011e+00 169 2004 5 2.01999e+00 9.40070e-01 147 2004 6 3.41956e+00 3.33315e-01 16 2004 7 8.16208e+00 5.39750e+00 64 2004 8 3.91032e+00 1.27031e+00 96 2004 9 4.16624e+00 1.70805e+00 176 2004 10 4.35290e+00 2.81777e+00 116 2004 11 7.59730e+00 2.47165e+00 145 2004 12 8.99985e+00 2.59510e+00 160 2005 1 5.72625e+00 3.41621e+00 132 2005 2 3.65972e+00 1.85344e+00 112 2005 3 3.60882e+00 1.16068e+00 176 2005 4 1.34944e+01 6.60669e+00 98 2005 5 1.05042e+01 6.57771e+00 80 2005 6 4.53211e+00 2.52932e+00 99 2005 7 6.03284e+00 4.85261e+00 117 2005 8 5.22137e+00 2.29699e+00 44 2005 9 1.05336e+01 1.21435e+01 95 2005 10 5.24706e+00 2.11892e+00 347 2005 11 3.51930e+00 6.83462e-01 178 2005 12 3.68189e+00 1.59178e+00 128 2006 1 4.12712e+00 1.67216e+00 144 2006 2 5.94864e+00 5.83081e+00 171 2006 3 5.01861e+00 4.56556e+00 259 2006 4 2.56214e+00 1.26768e+00 171 2006 5 4.64368e+00 2.14048e+00 153 2006 6 1.02386e+01 1.71874e+01 132 2006 7 1.54645e+00 1.79215e-01 32 2006 8 4.04841e+00 5.92622e-01 69 2006 9 1.17982e+01 1.21170e+01 142 2006 10 5.00034e+00 2.78329e+00 192 2006 11 5.42972e+00 2.96996e+00 244 2006 12 5.52220e+00 4.74988e+00 192 2007 1 4.36395e+00 1.94319e+00 96 2007 2 2.81045e+00 8.01213e-01 156 2007 3 2.77160e+00 2.38300e+00 210 2007 4 2.65906e+00 6.16185e-01 150 2007 5 3.30239e+00 6.31846e-01 60 2007 6 2.86332e+00 1.32958e+00 96 2007 7 5.57646e+00 2.81092e+00 64 2007 8 3.87194e+00 1.88613e+00 59 2007 9 3.71098e+00 1.54809e+00 108 2007 10 9.41088e+00 7.76394e+00 189 2007 11 1.16953e+01 1.62774e+01 238 2007 12 4.89073e+00 3.33730e+00 126 2008 1 9.73806e+00 5.77637e+00 144 2008 2 1.22596e+01 1.10277e+01 231 2008 3 1.49552e+01 1.40460e+01 174 2008 4 1.37697e+01 7.18596e+00 78 2008 5 9.83738e+00 2.13299e+00 51 2008 6 1.17121e+01 7.94452e+00 114 2008 7 4.46803e+00 3.86961e+00 96 2008 8 4.36416e+00 1.49193e+00 107 2008 9 6.02610e+00 3.61461e+00 139 2008 10 4.43474e+00 2.15058e+00 257 2008 11 3.42071e+00 1.24857e+00 289 2008 12 4.94268e+00 1.92558e+00 112 2009 1 8.89128e+00 5.52453e+00 184 2009 2 7.35763e+00 1.83499e+00 128 2009 3 3.47106e+00 8.64307e-01 124 2009 4 1.75624e+01 6.21121e+00 61 2009 5 2.33470e+01 2.20460e+01 32 2009 6 9.47882e+00 8.55671e+00 120 2009 7 9.06870e+00 1.43407e+00 16 2009 8 5.81650e+00 1.99464e+00 74 2009 9 1.03326e+01 6.76685e+00 112 2009 10 1.54698e+01 1.37197e+01 136 2009 11 1.46623e+01 1.21724e+01 180 2009 12 1.12774e+01 5.55497e+00 104 2010 1 1.01096e+01 4.37084e+00 176 2010 2 1.48926e+01 1.04155e+01 190 2010 3 1.15427e+01 5.72277e+00 113 2010 4 1.90859e+01 1.83572e+01 143 2010 5 1.12663e+01 9.01685e+00 110 2010 6 5.57392e+00 3.60614e+00 138 2010 7 4.56536e+00 2.18166e+00 99 2010 8 8.57098e+00 8.58853e+00 48 2010 9 6.94742e+00 3.71207e+00 185 2010 10 5.73587e+00 3.85368e+00 335 2010 11 8.64725e+00 1.17967e+01 198 2010 12 5.82118e+00 1.51862e+00 252 2011 1 5.36831e+00 2.49771e+00 223 2011 2 7.27338e+00 6.27545e+00 174 2011 3 4.74983e+00 2.93046e+00 164 2011 4 1.32511e+01 7.98055e+00 96 2011 5 6.39535e+00 3.88186e+00 141 2011 6 7.74714e+00 5.20123e+00 109 2011 7 4.68211e+00 2.43671e+00 108 2011 8 6.33405e+00 2.67486e+00 112 2011 9 9.05198e+00 6.55769e+00 129 2011 10 6.42717e+00 3.98868e+00 332 2011 11 2.84127e+00 1.04102e+00 221 2011 12 4.26199e+00 1.48210e+00 144 2012 1 4.71186e+00 1.24838e+00 206 2012 2 4.00205e+00 8.10283e-01 35 2012 3 5.43646e+00 5.00080e+00 158 2012 4 2.85894e+00 8.47944e-01 185 2012 5 4.67007e+00 1.63313e+00 96 2012 6 7.50469e+00 1.00180e+01 142 2012 7 5.42834e+00 2.82509e+00 54 2012 8 1.51058e+01 2.26236e+01 60 2012 9 1.12011e+01 9.18655e+00 159 2012 10 7.83078e+00 6.94920e+00 296 2012 11 3.85847e+00 1.25979e+00 295 2012 12 3.39444e+00 9.64420e-01 171 2013 1 2.74762e+00 1.26396e+00 128 2013 2 4.19819e+00 2.21845e+00 96 2013 3 1.26441e+01 8.70825e+00 181 2013 4 1.29426e+01 5.66829e+00 76 2013 5 6.35221e+00 2.74277e+00 96 2013 6 6.51860e+00 3.97382e+00 30 2013 7 4.51618e+00 4.19071e+00 80 2013 8 1.05002e+01 8.96243e+00 95 2013 9 1.05049e+01 1.07327e+01 190 2013 10 8.57422e+00 5.10012e+00 207 2013 11 5.50606e+00 4.79584e+00 206 2013 12 3.86101e+00 1.83936e+00 112 2014 1 8.41656e+00 5.99843e+00 160 2014 2 4.34516e+00 1.63062e+00 112 2014 3 1.13788e+01 9.26318e+00 112 2014 4 1.78299e+01 8.45556e+00 80 2014 5 2.27680e+01 1.74855e+01 68 2014 6 1.16455e+01 1.01620e+01 68 2014 7 5.59784e+00 4.23942e+00 80 2014 8 6.53659e+00 7.56775e+00 96 2014 9 2.61289e+00 2.05407e+00 144 2014 10 3.75805e+00 1.87734e+00 324 2014 11 4.02501e+00 1.52544e+00 224 2014 12 2.59966e+00 8.93965e-01 173 2015 1 4.62597e+00 4.03901e+00 208 2015 2 4.48557e+00 2.51067e+00 184 2015 3 3.22255e+00 1.60830e+00 112 2015 4 4.33169e+00 1.57914e+00 49 2015 5 4.75319e+00 1.59303e+00 98 2015 6 3.50697e+00 1.82257e+00 141 2015 7 6.50884e+00 3.69100e+00 66 2015 8 5.29920e+00 3.93790e+00 128 2015 9 2.51763e+00 6.46831e-01 112 2015 10 6.35761e+00 2.56643e+00 181 2015 11 2.32342e+01 1.91833e+01 146 2015 12 1.34955e+01 1.08715e+01 126 2016 1 1.22974e+01 4.63825e+00 141 2016 2 1.39050e+01 9.13259e+00 256 2016 3 9.56406e+00 2.63303e+00 129 2016 4 1.90354e+01 1.69309e+01 120 2016 5 1.55620e+01 1.87406e+01 147 2016 6 6.57433e+00 3.87273e+00 98 2016 7 4.18569e+00 1.61175e+00 109 2016 8 1.09304e+01 3.14036e+00 96 2016 9 5.71669e+00 4.17105e+00 189 2016 10 4.29731e+00 2.32745e+00 271 2016 11 3.82136e+00 1.54826e+00 176 2016 12 4.78994e+00 2.25297e+00 96 2017 1 1.31733e+01 7.09135e+00 192 2017 2 7.49609e+00 2.67080e+00 216 2017 3 9.45553e+00 1.16743e+01 189 2017 4 3.99043e+00 1.07677e+00 128 2017 5 4.39875e+00 2.13131e+00 160 2017 6 1.15398e+01 1.53990e+01 77 2017 7 1.60476e+01 1.04700e+01 79 2017 8 8.98371e+00 3.39779e+00 64 2017 9 8.03786e+00 7.06934e+00 175 2017 10 9.48240e+00 1.22018e+01 244 2017 11 6.08078e+00 3.03257e+00 256 2017 12 4.08886e+00 3.88978e+00 206 2018 1 4.03704e+00 1.33744e+00 224 2018 2 2.13507e+00 1.05961e+00 107 2018 3 9.09386e+00 5.31028e+00 145 2018 4 2.72081e+00 4.59912e-01 128 2018 5 1.49771e+01 1.22367e+01 116 2018 6 7.14028e+00 3.89671e+00 78 2018 7 4.70377e+00 3.20896e+00 76 2018 8 1.14838e+01 1.23054e+01 61 2018 9 6.41025e+00 5.14832e+00 176 2018 10 7.43487e+00 4.17706e+00 192 2018 11 9.93712e+00 8.44457e+00 85 2018 12 8.98439e+00 1.60215e+00 80 2019 1 1.07577e+01 3.86284e+00 224 2019 2 1.69097e+01 1.20937e+01 48 2019 3 7.27782e+00 3.65005e+00 178 2019 4 7.48790e+00 5.04161e+00 128 2019 5 1.36334e+01 1.53765e+01 152 2019 6 7.93053e+00 6.89455e+00 64 2019 7 6.54542e+00 3.44062e+00 111 2019 8 4.14547e+00 3.21546e+00 60 2019 9 9.27234e+00 1.15273e+01 266 2019 10 4.55408e+00 1.65640e+00 107 2019 11 4.44605e+00 2.78743e+00 144 2019 12 5.42407e+00 3.48359e+00 136 2020 1 1.55255e+01 1.58250e+01 111 2020 2 6.52384e+00 3.49975e+00 120 2020 3 1.41691e+01 6.51182e+00 107 2020 4 1.43452e+01 1.19618e+01 132 2020 5 9.24092e+00 4.10069e+00 93 2020 6 3.76690e+00 1.53345e+00 96 2020 7 7.34043e+00 5.16335e+00 80 2020 8 5.62238e+00 4.37298e+00 112 2020 9 1.14674e+01 5.27249e+00 47 2020 10 1.08060e+01 1.25987e+01 173 2020 11 7.76969e+00 3.43955e+00 240 2020 12 5.43763e+00 2.27943e+00 200 2021 1 8.17207e+00 3.41241e+00 159 2021 2 4.05315e+00 1.21890e+00 128 2021 3 4.18947e+00 2.23598e+00 94 2021 4 7.30660e+00 6.59338e+00 167 2021 5 1.02153e+01 6.63161e+00 80 2021 6 3.37881e+00 1.45017e+00 37 2021 7 1.81887e+01 1.34378e+01 30 2021 8 1.28234e+01 1.29432e+01 80 2021 9 2.06857e+01 1.79230e+01 104 2021 10 1.89227e+01 1.59551e+01 116 2021 11 9.52342e+00 6.40381e+00 259 2021 12 6.72392e+00 3.67113e+00 119 2022 1 6.56110e+00 3.34981e+00 165 2022 2 6.30582e+00 4.50912e+00 192 2022 3 3.72770e+00 2.21526e+00 192 2022 4 7.64941e+00 4.87850e+00 48 2022 5 5.40653e+00 3.51621e+00 128 2022 6 6.21092e+00 4.22191e+00 80 2022 7 2.71923e+00 1.26144e+00 140 2022 8 4.35783e+00 5.04430e+00 111 2022 9 6.18179e+00 5.05488e+00 208 2022 10 5.00924e+00 2.54598e+00 304 2022 11 4.00522e+00 1.83586e+00 196 2022 12 5.72516e+00 3.51639e+00 128 2023 1 5.31525e+00 1.45313e+00 178 2023 2 4.75158e+00 1.99784e+00 159 2023 3 3.20497e+00 2.71454e+00 74 2023 4 3.56314e+00 1.42156e+00 64 2023 5 2.20093e+00 1.06171e+00 96 2023 6 2.36135e+00 8.09904e-01 64 2023 7 5.20479e+00 3.75472e+00 118 2023 8 4.02801e+00 1.45069e+00 176 2023 9 6.15536e+00 5.74326e+00 144 2023 10 4.47696e+00 2.49797e+00 224 2023 11 4.93593e+00 1.80634e+00 144 2023 12 4.30277e+00 2.21276e+00 130 2024 1 3.99144e+00 1.04932e+00 80 2024 2 4.91542e+00 2.29853e+00 128 2024 3 8.34656e+00 5.12328e+00 92 2024 4 9.71124e+00 3.39853e+00 32