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 1.48591e+01 4.76357e+00 176 2002 8 8.31946e+00 2.87740e+00 69 2002 9 8.24991e+00 8.69800e+00 64 2002 10 6.44462e+00 2.21206e+00 120 2002 11 6.51270e+00 3.39722e+00 144 2002 12 2.88687e+00 1.53689e+00 150 2003 1 1.34773e+00 1.68368e+00 240 2003 2 2.69175e+00 7.32707e-01 188 2003 3 7.21889e+00 3.00505e+00 144 2003 4 2.84229e+00 3.58818e+00 160 2003 5 5.50047e-01 1.71033e-01 48 2003 6 nan nan 0 2003 7 8.67994e-01 2.00497e-01 30 2003 8 1.73066e+00 1.11533e+00 47 2003 9 8.95043e+00 2.81657e+00 112 2003 10 9.11335e+00 1.41541e+00 192 2003 11 1.07617e+01 3.22833e+00 221 2003 12 3.11764e+00 1.46359e+00 215 2004 1 7.48766e+00 3.03253e+00 96 2004 2 4.28934e+00 2.12504e+00 80 2004 3 5.02455e+00 2.11794e+00 220 2004 4 7.84656e+00 3.02162e+00 176 2004 5 1.84824e+01 4.19330e+00 128 2004 6 2.60062e+00 1.31178e+00 48 2004 7 3.09234e-01 3.29399e-01 69 2004 8 3.20602e+00 2.45514e+00 112 2004 9 4.83365e+00 4.25830e+00 191 2004 10 5.11742e+00 3.48849e+00 116 2004 11 2.44057e+00 3.15376e-01 80 2004 12 1.34331e+00 5.26319e-01 137 2005 1 2.90423e+00 1.25459e+00 160 2005 2 4.19526e+00 1.28757e+00 111 2005 3 2.46492e+00 1.48703e+00 156 2005 4 4.09858e+00 2.69298e+00 141 2005 5 6.22151e+00 3.72549e+00 112 2005 6 6.81563e+00 4.03940e+00 206 2005 7 8.08595e+00 6.00524e+00 134 2005 8 1.26516e+01 8.13475e+00 64 2005 9 5.54540e+00 4.58162e+00 175 2005 10 8.96101e+00 3.93163e+00 288 2005 11 5.06770e+00 1.60477e+00 147 2005 12 4.64783e+00 1.72818e+00 126 2006 1 3.87211e+00 1.89362e+00 112 2006 2 2.60997e+00 1.16960e+00 160 2006 3 9.19519e+00 3.69707e+00 213 2006 4 7.39767e+00 6.50182e+00 160 2006 5 2.70733e+00 1.33370e+00 159 2006 6 3.67042e+00 2.56553e+00 176 2006 7 1.57133e+01 1.58686e+00 45 2006 8 1.35486e+01 2.76978e+00 152 2006 9 1.17047e+01 3.59852e+00 144 2006 10 8.12695e+00 4.35186e+00 200 2006 11 6.93575e+00 3.83930e+00 256 2006 12 6.37179e+00 3.34546e+00 160 2007 1 3.76429e+00 1.63811e+00 80 2007 2 6.13155e+00 3.64725e+00 113 2007 3 5.88327e+00 2.00794e+00 179 2007 4 8.88801e+00 1.39192e+00 160 2007 5 1.67783e+01 5.57231e+00 80 2007 6 1.05645e+01 5.62804e+00 99 2007 7 1.31324e+01 6.03434e+00 80 2007 8 1.16442e+01 1.22781e+00 32 2007 9 9.18054e+00 3.16611e+00 113 2007 10 6.81575e+00 3.09105e+00 190 2007 11 7.82791e+00 9.91356e-01 192 2007 12 6.97642e+00 1.85657e+00 112 2008 1 4.26855e+00 2.20485e+00 106 2008 2 5.76693e+00 2.44973e+00 228 2008 3 1.55490e+00 1.11203e+00 128 2008 4 5.02477e+00 2.09464e+00 96 2008 5 2.37483e+00 3.49030e+00 110 2008 6 1.04588e+00 1.07273e+00 134 2008 7 1.52401e+00 6.87601e-01 33 2008 8 2.22273e+00 6.32732e-01 96 2008 9 8.76184e+00 4.45288e+00 147 2008 10 8.87019e+00 2.58444e+00 128 2008 11 1.06908e+01 2.33855e+00 299 2008 12 6.14198e+00 2.46033e+00 208 2009 1 2.71429e+00 1.13826e+00 176 2009 2 1.77365e+00 3.54789e-01 128 2009 3 2.93065e+00 2.71619e+00 147 2009 4 3.56892e-01 6.89386e-01 80 2009 5 2.62085e+00 1.13163e+00 72 2009 6 9.75420e-01 1.17981e+00 131 2009 7 3.02492e+00 1.19546e+00 44 2009 8 8.29595e+00 2.30467e+00 128 2009 9 1.04631e+01 2.29878e+00 106 2009 10 8.36649e+00 3.17545e+00 139 2009 11 5.82960e+00 2.34227e+00 144 2009 12 4.61370e+00 2.15799e+00 89 2010 1 2.13000e+00 1.67499e+00 176 2010 2 3.46527e-01 7.24332e-01 130 2010 3 7.23232e-01 6.19110e-01 144 2010 4 1.24398e+00 9.79009e-01 157 2010 5 4.53488e+00 3.89502e+00 124 2010 6 9.91541e-01 1.06578e+00 144 2010 7 6.82644e+00 1.11610e+00 64 2010 8 3.59732e+00 2.13568e+00 96 2010 9 5.96973e+00 2.64307e+00 144 2010 10 8.04987e+00 3.00276e+00 338 2010 11 4.89342e+00 1.89166e+00 208 2010 12 1.90929e+00 2.05247e+00 194 2011 1 1.48708e+00 7.50760e-01 176 2011 2 1.25805e+00 1.01895e+00 192 2011 3 6.85382e+00 4.29979e+00 160 2011 4 1.83090e+00 1.04821e+00 121 2011 5 3.18053e+00 3.13875e+00 165 2011 6 3.62884e-01 5.56972e-01 112 2011 7 3.13012e+00 1.57606e+00 112 2011 8 8.11253e-01 7.76683e-01 171 2011 9 4.64483e+00 2.73019e+00 206 2011 10 6.89584e+00 2.81507e+00 256 2011 11 4.82264e+00 1.34358e+00 112 2011 12 5.62140e+00 9.64091e-01 80 2012 1 3.04640e+00 1.44080e+00 207 2012 2 4.90391e+00 1.41330e-01 32 2012 3 8.47312e+00 4.00365e+00 208 2012 4 9.06678e+00 4.48510e+00 154 2012 5 1.27894e+01 5.13702e+00 175 2012 6 1.08360e+01 4.14944e+00 159 2012 7 1.28432e+01 6.89442e-01 32 2012 8 3.71326e+00 1.36754e+00 58 2012 9 7.41248e+00 5.13509e+00 173 2012 10 8.08281e+00 3.37096e+00 272 2012 11 7.04168e+00 2.26083e+00 223 2012 12 6.83113e+00 1.67077e+00 108 2013 1 5.96362e+00 1.96519e+00 112 2013 2 4.07300e+00 1.76743e+00 112 2013 3 1.42260e+00 1.33739e+00 176 2013 4 1.03315e+01 5.09040e+00 80 2013 5 6.37124e+00 3.73650e+00 112 2013 6 1.57137e+01 5.20498e+00 80 2013 7 4.27021e+00 3.07781e+00 112 2013 8 7.59504e-01 5.71971e-01 64 2013 9 5.30159e+00 3.67070e+00 159 2013 10 1.00405e+01 2.91642e+00 112 2013 11 8.80395e+00 1.31801e+00 127 2013 12 9.08047e+00 1.43336e+00 127 2014 1 6.11797e+00 1.14755e+00 176 2014 2 3.21849e+00 2.35193e+00 160 2014 3 4.03549e+00 9.16951e-01 144 2014 4 6.77570e+00 3.43688e+00 116 2014 5 1.81569e+00 2.36567e+00 98 2014 6 6.76416e-01 7.44901e-01 87 2014 7 4.79723e+00 2.91571e+00 80 2014 8 5.56472e+00 4.47400e+00 128 2014 9 1.14548e+01 2.18126e+00 112 2014 10 6.99035e+00 1.91534e+00 309 2014 11 6.10841e+00 1.44319e+00 208 2014 12 6.55619e+00 1.40309e+00 114 2015 1 4.16781e+00 1.89766e+00 144 2015 2 4.51190e+00 1.21200e+00 192 2015 3 8.85961e+00 1.95360e+00 144 2015 4 7.91574e+00 2.45219e+00 84 2015 5 1.28749e+01 5.02321e+00 144 2015 6 1.18142e+01 5.38025e+00 144 2015 7 1.24622e+00 3.74260e-01 48 2015 8 6.51013e+00 4.08684e+00 160 2015 9 1.06157e+01 1.87595e+00 148 2015 10 9.41882e+00 3.61166e+00 148 2015 11 3.88835e+00 3.25528e+00 112 2015 12 6.32885e+00 1.45849e+00 80 2016 1 6.10515e+00 2.19902e+00 160 2016 2 5.28021e-01 5.22076e-01 240 2016 3 5.91603e-01 5.77014e-01 71 2016 4 9.59680e-01 1.58537e+00 160 2016 5 3.38058e+00 2.87287e+00 192 2016 6 1.98308e+00 3.40155e+00 112 2016 7 3.00053e-02 4.52812e-02 78 2016 8 6.09009e+00 1.84628e+00 121 2016 9 9.08859e+00 2.50149e+00 112 2016 10 6.93788e+00 1.82453e+00 272 2016 11 1.04750e+01 2.48754e+00 211 2016 12 6.56610e+00 1.85988e+00 179 2017 1 5.70339e+00 4.59841e+00 190 2017 2 1.86449e+00 9.93374e-01 224 2017 3 5.97420e+00 3.27573e+00 139 2017 4 5.67882e+00 1.62675e+00 95 2017 5 1.66045e+00 2.44264e+00 160 2017 6 4.54418e+00 1.40395e+00 96 2017 7 7.45152e-01 7.89461e-01 86 2017 8 6.36744e-01 8.35312e-01 82 2017 9 3.87714e+00 1.52265e+00 192 2017 10 5.66556e+00 3.54787e+00 204 2017 11 7.21688e+00 1.57789e+00 192 2017 12 6.07231e+00 2.85678e+00 136 2018 1 3.72284e+00 1.71780e+00 208 2018 2 8.76129e+00 2.82335e+00 112 2018 3 9.99444e+00 5.39692e+00 190 2018 4 7.05044e+00 4.77885e+00 176 2018 5 1.25522e+00 1.41629e+00 147 2018 6 2.40769e+00 2.83352e+00 80 2018 7 4.82865e+00 1.56662e+00 144 2018 8 2.72597e+00 1.04709e+00 112 2018 9 9.32732e+00 4.62834e+00 116 2018 10 7.85939e+00 5.52895e+00 162 2018 11 2.49341e+00 1.30293e+00 64 2018 12 1.69231e+00 1.86157e+00 80 2019 1 3.52188e-01 6.02088e-01 128 2019 2 2.64061e+00 1.79717e+00 48 2019 3 4.43445e+00 1.21168e+00 192 2019 4 3.78065e+00 2.70197e+00 143 2019 5 9.97212e-01 1.11328e+00 133 2019 6 7.18050e-02 1.24629e-01 66 2019 7 4.82327e-01 9.17956e-01 80 2019 8 1.96228e+00 2.12946e+00 80 2019 9 2.23632e+00 2.11745e+00 224 2019 10 4.19201e+00 1.24103e+00 112 2019 11 8.47786e+00 3.07972e+00 162 2019 12 7.05247e+00 2.68950e+00 176 2020 1 5.43811e+00 8.26174e-01 136 2020 2 5.32053e+00 3.32313e+00 112 2020 3 1.25158e+00 2.63189e+00 109 2020 4 9.81128e-01 1.50925e+00 143 2020 5 1.79039e+00 1.33827e+00 99 2020 6 1.25881e+01 1.85755e+00 77 2020 7 1.93727e+00 1.55617e+00 96 2020 8 1.67075e+00 2.42775e+00 98 2020 9 4.74330e+00 4.46951e+00 105 2020 10 9.11058e+00 5.11377e+00 144 2020 11 9.66613e+00 4.41093e+00 193 2020 12 6.51012e+00 2.11670e+00 224 2021 1 2.28570e+00 2.01741e+00 128 2021 2 2.32344e+00 2.03390e+00 94 2021 3 7.32708e+00 3.40773e+00 144 2021 4 1.79654e+01 5.27481e+00 160 2021 5 1.54390e+01 3.70534e+00 75 2021 6 5.14870e+00 5.08803e+00 32 2021 7 1.01247e+00 1.44741e+00 80 2021 8 5.11656e+00 3.28768e+00 65 2021 9 4.80036e+00 5.54721e+00 135 2021 10 6.89254e+00 2.46618e+00 151 2021 11 4.69753e+00 1.76433e+00 180 2021 12 5.62404e+00 1.68365e+00 132 2022 1 2.82348e+00 2.71775e+00 160 2022 2 4.84939e+00 3.06432e+00 220 2022 3 4.76434e+00 2.96184e+00 192 2022 4 5.15882e+00 5.13815e+00 96 2022 5 1.69966e+01 7.32709e+00 113 2022 6 2.18404e+00 3.15885e+00 128 2022 7 6.01359e+00 6.22518e+00 87 2022 8 1.31492e+00 8.14834e-01 106 2022 9 7.53421e+00 3.06275e+00 259 2022 10 8.07792e+00 2.11123e+00 256 2022 11 7.01599e+00 2.08947e+00 160 2022 12 6.27271e+00 1.60936e+00 114 2023 1 7.66911e+00 3.52692e+00 224 2023 2 4.74398e+00 1.77072e+00 128 2023 3 2.92230e+00 3.06940e+00 112 2023 4 6.99439e+00 2.72772e+00 60 2023 5 1.22584e+01 3.82251e+00 176 2023 6 1.38354e+01 8.88325e+00 144 2023 7 5.24956e+00 2.81714e+00 143 2023 8 4.42661e+00 2.12950e+00 192 2023 9 1.58457e+00 8.35481e-01 160 2023 10 4.58354e+00 1.76801e+00 192 2023 11 5.83223e+00 1.29871e+00 145 2023 12 5.38899e+00 1.85169e+00 128 2024 1 2.80909e+00 1.79812e+00 79 2024 2 1.60620e+00 1.29800e+00 96 2024 3 2.91059e+00 1.54322e+00 96 2024 4 4.39919e+00 1.66223e-01 32