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 2.52777e+01 5.84283e+00 28 2002 8 1.44913e+01 4.51131e+00 63 2002 9 6.36642e+00 9.37818e+00 49 2002 10 4.80015e+00 5.79930e+00 94 2002 11 4.21835e-02 1.45641e-01 101 2002 12 3.49798e-01 9.31999e-01 96 2003 1 1.09115e-01 2.20171e-01 156 2003 2 9.03838e-01 1.28875e+00 118 2003 3 3.19499e+00 5.22689e+00 75 2003 4 7.89519e-01 1.13842e+00 60 2003 5 5.97594e+00 4.84123e+00 22 2003 6 4.86785e+00 3.93693e+00 29 2003 7 4.90889e-01 4.53196e-01 20 2003 8 2.83388e+00 3.91718e+00 33 2003 9 1.13286e+00 1.86910e+00 75 2003 10 3.16697e+00 3.06266e+00 151 2003 11 3.02671e+00 2.39383e+00 154 2003 12 4.62446e+00 3.72356e+00 116 2004 1 4.84210e+00 4.82238e+00 91 2004 2 4.19781e+00 3.16790e+00 61 2004 3 9.13179e+00 6.35677e+00 136 2004 4 8.85484e+00 5.23379e+00 112 2004 5 1.05890e+01 5.78035e+00 87 2004 6 1.14862e+01 3.97105e+00 16 2004 7 5.84133e+00 7.50688e+00 31 2004 8 1.12477e+01 4.48636e+00 28 2004 9 4.13050e+00 4.60252e+00 73 2004 10 3.97035e+00 5.30382e+00 79 2004 11 1.67991e+00 1.91802e+00 113 2004 12 1.51371e-01 2.36395e-01 126 2005 1 5.08120e+00 4.05940e+00 93 2005 2 2.88807e+00 1.63887e+00 48 2005 3 5.68843e+00 4.01960e+00 111 2005 4 3.76403e-02 1.15514e-01 60 2005 5 8.63023e-01 1.52943e+00 41 2005 6 4.45378e+00 4.98020e+00 47 2005 7 9.54358e+00 7.47584e+00 63 2005 8 1.24318e-02 6.23351e-03 16 2005 9 2.80403e+00 4.82164e+00 76 2005 10 3.05321e+00 4.43849e+00 239 2005 11 4.53405e+00 3.93236e+00 163 2005 12 3.48385e+00 1.91859e+00 50 2006 1 2.90928e+00 3.13680e+00 105 2006 2 3.03850e+00 3.07673e+00 151 2006 3 6.30385e+00 4.09233e+00 140 2006 4 1.11714e+01 5.29455e+00 97 2006 5 1.19853e+01 7.11645e+00 107 2006 6 7.25864e+00 5.58537e+00 52 2006 7 1.94671e+01 5.72520e+00 16 2006 8 1.07727e+01 4.78469e+00 17 2006 9 7.89005e+00 5.30084e+00 109 2006 10 5.36657e+00 4.64179e+00 123 2006 11 4.95116e+00 4.16440e+00 197 2006 12 7.48065e+00 6.04826e+00 115 2007 1 6.50954e+00 3.66260e+00 86 2007 2 1.04501e+01 5.68799e+00 113 2007 3 1.08793e+01 5.06974e+00 136 2007 4 9.98566e+00 4.01526e+00 96 2007 5 8.73260e+00 5.20839e+00 48 2007 6 1.34822e+01 4.81522e+00 42 2007 7 8.38463e+00 6.71701e+00 49 2007 8 1.14807e+01 3.73746e+00 48 2007 9 1.16030e+01 6.99686e+00 84 2007 10 2.15481e+00 3.80224e+00 162 2007 11 5.92283e-01 1.53759e+00 162 2007 12 3.58147e+00 4.09505e+00 81 2008 1 1.59136e+00 1.93692e+00 98 2008 2 2.38297e+00 3.26041e+00 117 2008 3 2.83681e-01 5.37922e-01 130 2008 4 3.06898e+00 2.91506e+00 95 2008 5 5.26568e+00 4.51080e+00 90 2008 6 2.49468e+00 3.42108e+00 85 2008 7 3.96621e+00 4.76104e+00 44 2008 8 1.20169e+01 4.56996e+00 41 2008 9 2.95032e+00 3.89004e+00 65 2008 10 3.98200e+00 4.26916e+00 160 2008 11 7.68634e+00 4.51617e+00 198 2008 12 4.06831e+00 4.72145e+00 69 2009 1 2.19568e+00 1.92554e+00 107 2009 2 8.11238e-01 9.09010e-01 102 2009 3 6.06205e+00 5.60813e+00 88 2009 4 1.60283e+00 2.22634e+00 64 2009 5 5.02883e+00 3.81788e+00 32 2009 6 7.09947e+00 5.15189e+00 47 2009 7 5.15890e+00 2.58207e+00 15 2009 8 1.03520e+01 8.19576e+00 63 2009 9 4.09868e+00 5.06818e+00 98 2009 10 3.06104e+00 4.02172e+00 138 2009 11 1.63525e+00 3.00882e+00 130 2009 12 2.62845e-02 6.09081e-02 29 2010 1 3.89734e-01 7.21537e-01 121 2010 2 2.11640e-01 3.40311e-01 141 2010 3 1.64213e+00 3.41940e+00 78 2010 4 6.33970e-01 9.75557e-01 88 2010 5 4.55318e+00 4.84414e+00 53 2010 6 2.81614e+00 3.52159e+00 74 2010 7 1.49547e+01 6.29983e+00 57 2010 8 6.13008e+00 8.21734e+00 24 2010 9 5.59900e+00 4.91449e+00 125 2010 10 7.12181e+00 5.97740e+00 235 2010 11 3.63971e+00 4.28020e+00 110 2010 12 1.65331e+00 1.63296e+00 157 2011 1 3.64164e+00 2.00338e+00 131 2011 2 1.99491e+00 1.88648e+00 142 2011 3 5.62369e+00 4.69596e+00 175 2011 4 6.73500e+00 5.36806e+00 81 2011 5 6.54501e+00 5.15468e+00 103 2011 6 6.70062e+00 6.05152e+00 72 2011 7 8.13334e+00 3.89189e+00 32 2011 8 7.39029e+00 4.60870e+00 73 2011 9 3.97928e+00 4.01604e+00 98 2011 10 3.01030e+00 3.53276e+00 228 2011 11 7.36557e+00 5.94649e+00 153 2011 12 4.85266e+00 3.06786e+00 94 2012 1 7.30991e+00 4.42107e+00 173 2012 2 1.11844e+01 5.67547e+00 52 2012 3 5.20803e+00 4.02528e+00 139 2012 4 9.30011e+00 7.01836e+00 93 2012 5 1.51230e+01 7.32321e+00 95 2012 6 1.06370e+01 8.58192e+00 82 2012 7 1.64558e+01 7.21535e+00 45 2012 8 2.56694e+00 3.30335e+00 32 2012 9 1.55933e+00 2.86223e+00 91 2012 10 2.85883e+00 3.89994e+00 185 2012 11 2.28557e+00 2.01915e+00 206 2012 12 4.68097e+00 4.61899e+00 136 2013 1 6.79597e+00 3.97824e+00 102 2013 2 8.51698e+00 4.12488e+00 76 2013 3 2.64210e+00 3.23462e+00 141 2013 4 2.96848e-01 5.88448e-01 30 2013 5 4.03667e+00 4.54671e+00 86 2013 6 2.41022e+00 1.70674e+00 20 2013 7 8.45601e-01 1.73817e+00 38 2013 8 1.10843e+00 1.97480e+00 60 2013 9 3.87565e+00 5.33452e+00 90 2013 10 4.32355e+00 5.36964e+00 115 2013 11 2.26738e+00 2.75292e+00 132 2013 12 4.67898e+00 4.64792e+00 83 2014 1 1.81970e+00 3.01894e+00 135 2014 2 2.83110e+00 4.03729e+00 77 2014 3 5.75077e-01 8.78935e-01 131 2014 4 8.45745e-01 1.93282e+00 60 2014 5 4.99424e-01 6.04406e-01 47 2014 6 1.02902e+01 6.09476e+00 29 2014 7 6.40300e+00 3.80854e+00 32 2014 8 8.48354e+00 4.63432e+00 30 2014 9 1.79246e+01 6.07067e+00 86 2014 10 7.48019e+00 6.37065e+00 267 2014 11 7.32922e+00 4.26203e+00 166 2014 12 3.73313e+00 3.99696e+00 92 2015 1 1.67472e+00 3.21690e+00 133 2015 2 4.87436e+00 4.54235e+00 137 2015 3 4.36310e+00 5.41804e+00 83 2015 4 1.03643e+01 5.01315e+00 46 2015 5 8.11393e+00 6.62970e+00 102 2015 6 7.97164e+00 5.61808e+00 89 2015 7 7.53745e+00 3.10593e+00 36 2015 8 1.51917e+01 6.40042e+00 58 2015 9 7.14861e+00 5.50036e+00 96 2015 10 1.13506e+00 2.47116e+00 158 2015 11 2.35720e-01 3.56817e-01 92 2015 12 1.84300e+00 2.28921e+00 42 2016 1 4.39939e-05 1.61823e-04 96 2016 2 9.51903e-02 1.84243e-01 156 2016 3 5.65353e-01 6.78084e-01 72 2016 4 1.08326e+00 1.89905e+00 61 2016 5 1.15411e+00 1.91686e+00 59 2016 6 8.35252e+00 6.38752e+00 80 2016 7 9.16709e+00 8.33819e+00 58 2016 8 1.06790e+01 7.11025e+00 71 2016 9 5.38283e+00 4.64053e+00 100 2016 10 8.48595e+00 5.29266e+00 247 2016 11 6.26476e+00 4.18070e+00 121 2016 12 4.02148e+00 3.02432e+00 100 2017 1 1.48778e+00 3.13918e+00 119 2017 2 7.86208e-01 1.43872e+00 169 2017 3 3.16975e+00 3.57710e+00 127 2017 4 6.10107e+00 3.72415e+00 108 2017 5 6.10273e+00 3.28266e+00 114 2017 6 1.02754e+01 3.02609e+00 22 2017 7 5.69076e+00 6.16128e+00 73 2017 8 4.24861e+00 7.99072e+00 19 2017 9 2.10150e+00 2.55821e+00 72 2017 10 3.62469e+00 4.01004e+00 160 2017 11 3.88592e+00 3.14525e+00 140 2017 12 7.36296e+00 4.50805e+00 99 2018 1 1.11752e+01 4.75248e+00 113 2018 2 7.63794e+00 5.37033e+00 54 2018 3 5.78813e+00 5.46040e+00 146 2018 4 9.79978e+00 5.97575e+00 100 2018 5 1.26375e+01 5.20727e+00 30 2018 6 8.90732e+00 5.32703e+00 63 2018 7 1.02778e+01 5.89148e+00 56 2018 8 1.89224e+00 2.64127e+00 69 2018 9 5.07847e+00 5.03181e+00 109 2018 10 1.67588e+00 2.77584e+00 225 2018 11 2.43426e+00 5.23776e+00 44 2018 12 2.99686e-02 6.10155e-02 66 2019 1 2.92674e-01 7.89296e-01 94 2019 2 2.62904e+00 3.09359e+00 32 2019 3 4.64845e-01 8.98505e-01 132 2019 4 4.45701e+00 3.53336e+00 74 2019 5 5.05005e+00 5.00831e+00 167 2019 6 7.15898e+00 4.56301e+00 48 2019 7 1.55870e+00 2.46125e+00 20 2019 8 9.88885e+00 3.66469e+00 32 2019 9 5.84825e+00 4.09196e+00 138 2019 10 6.67739e+00 4.61241e+00 95 2019 11 4.45001e+00 3.10836e+00 93 2019 12 5.32067e+00 2.93777e+00 65 2020 1 3.71208e+00 2.86686e+00 83 2020 2 3.49753e+00 4.21506e+00 118 2020 3 8.55430e-01 7.21575e-01 51 2020 4 5.63756e-01 1.12428e+00 70 2020 5 5.22447e+00 9.68603e+00 76 2020 6 1.00719e+01 6.04054e+00 57 2020 7 1.09130e+01 4.91959e+00 41 2020 8 8.42660e+00 4.75828e+00 16 2020 9 2.50872e+00 2.85168e+00 32 2020 10 9.83787e-02 2.11039e-01 108 2020 11 2.60827e-01 5.46731e-01 113 2020 12 6.50174e-01 1.38537e+00 154 2021 1 5.14814e-01 8.26892e-01 54 2021 2 2.57618e+00 1.99200e+00 110 2021 3 1.81988e+00 2.61570e+00 94 2021 4 3.86789e+00 3.14694e+00 107 2021 5 2.36747e+00 3.33587e+00 68 2021 6 nan nan 0 2021 7 2.76371e+00 4.01939e+00 45 2021 8 6.33844e+00 5.77500e+00 49 2021 9 3.38906e-01 5.14184e-01 33 2021 10 2.69266e-02 6.81636e-02 39 2021 11 9.99191e-01 1.64599e+00 176 2021 12 5.18365e+00 4.00641e+00 92 2022 1 3.15417e+00 3.38388e+00 147 2022 2 6.60450e+00 6.58079e+00 130 2022 3 1.11369e+01 6.76657e+00 144 2022 4 8.03833e+00 7.07681e+00 36 2022 5 9.57410e+00 5.67453e+00 57 2022 6 1.56364e+01 7.13189e+00 55 2022 7 1.90559e+01 6.51300e+00 89 2022 8 9.04275e+00 6.72448e+00 84 2022 9 6.16710e+00 4.61696e+00 150 2022 10 5.53074e+00 5.15156e+00 250 2022 11 5.23513e+00 4.22875e+00 190 2022 12 6.34597e+00 4.74222e+00 136 2023 1 5.67777e+00 4.43761e+00 173 2023 2 4.92414e+00 3.64594e+00 159 2023 3 6.92203e+00 6.21912e+00 50 2023 4 1.66384e+01 8.15302e+00 64 2023 5 1.76933e+01 8.80125e+00 78 2023 6 1.97834e+01 5.59344e+00 31 2023 7 6.14130e+00 5.48769e+00 64 2023 8 5.68577e+00 4.43362e+00 80 2023 9 1.80187e+00 2.48743e+00 80 2023 10 4.93952e+00 5.07593e+00 195 2023 11 3.46422e+00 4.64055e+00 135 2023 12 4.73234e+00 2.69346e+00 68 2024 1 1.35687e+00 1.52095e+00 93 2024 2 2.45302e+00 3.33874e+00 109 2024 3 3.26888e+00 4.68659e+00 104 2024 4 9.01532e-02 9.23992e-02 31