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 7.52817e-01 2.40620e-01 28 2002 8 1.52042e+00 1.37562e+00 63 2002 9 4.92549e+00 2.87430e+00 49 2002 10 3.60202e+00 2.03044e+00 94 2002 11 2.93170e+01 2.33570e+01 97 2002 12 1.21166e+01 1.66880e+01 93 2003 1 1.16188e+01 6.03480e+00 156 2003 2 1.04231e+01 9.73648e+00 118 2003 3 1.29511e+01 1.53196e+01 83 2003 4 7.74095e+00 4.34859e+00 60 2003 5 4.17068e+00 3.85531e+00 22 2003 6 4.80267e+00 3.69235e+00 29 2003 7 8.51475e+00 3.42116e+00 20 2003 8 8.60263e+00 1.32795e+01 34 2003 9 1.16779e+01 1.01224e+01 79 2003 10 1.09080e+01 1.89462e+01 167 2003 11 3.09470e+00 1.07986e+00 154 2003 12 2.79849e+00 1.35950e+00 116 2004 1 2.67987e+00 1.39506e+00 91 2004 2 3.25565e+00 1.77081e+00 61 2004 3 2.21632e+00 1.58981e+00 136 2004 4 1.86041e+00 9.30122e-01 112 2004 5 1.68636e+00 6.16330e-01 87 2004 6 1.50981e+00 2.96336e-01 16 2004 7 3.61832e+00 1.70750e+00 31 2004 8 1.81013e+00 4.85952e-01 28 2004 9 3.59209e+00 1.55371e+00 73 2004 10 4.29995e+00 3.51491e+00 79 2004 11 8.75836e+00 1.18966e+01 126 2004 12 7.69720e+00 3.06757e+00 126 2005 1 4.52858e+00 5.78367e+00 101 2005 2 3.31759e+00 8.40124e-01 48 2005 3 2.23705e+00 6.48273e-01 111 2005 4 1.11192e+01 3.86147e+00 60 2005 5 8.20197e+00 5.96332e+00 41 2005 6 4.12549e+00 1.78305e+00 47 2005 7 2.72414e+00 1.74164e+00 63 2005 8 3.81289e+00 3.42076e-01 16 2005 9 1.64932e+01 2.77012e+01 70 2005 10 6.40950e+00 5.17269e+00 240 2005 11 2.83605e+00 1.41880e+00 163 2005 12 2.86594e+00 8.57475e-01 50 2006 1 4.15658e+00 2.71724e+00 105 2006 2 3.43859e+00 1.85938e+00 151 2006 3 2.49507e+00 1.17211e+00 140 2006 4 1.50657e+00 4.98483e-01 97 2006 5 1.62995e+00 7.75236e-01 107 2006 6 2.37130e+00 1.02114e+00 52 2006 7 9.41043e-01 1.99647e-01 16 2006 8 1.82327e+00 5.21084e-01 17 2006 9 2.53767e+00 1.41632e+00 109 2006 10 2.57642e+00 8.44465e-01 123 2006 11 4.19920e+00 6.30490e+00 197 2006 12 2.27525e+00 1.22343e+00 115 2007 1 2.00287e+00 6.27821e-01 86 2007 2 1.77918e+00 1.49076e+00 113 2007 3 1.53542e+00 7.00313e-01 136 2007 4 1.54718e+00 4.11598e-01 96 2007 5 2.09989e+00 1.17464e+00 48 2007 6 1.41958e+00 5.08386e-01 42 2007 7 2.90989e+00 3.63855e+00 49 2007 8 1.55081e+00 3.40445e-01 48 2007 9 1.64610e+00 7.25417e-01 84 2007 10 1.24890e+01 1.26183e+01 166 2007 11 1.30862e+01 9.85367e+00 161 2007 12 3.55080e+00 1.50561e+00 81 2008 1 4.85417e+00 2.74447e+00 98 2008 2 6.23318e+00 5.67774e+00 119 2008 3 1.52018e+01 1.13202e+01 132 2008 4 4.34322e+00 2.64396e+00 95 2008 5 4.49890e+00 6.17304e+00 91 2008 6 6.42571e+00 5.44026e+00 85 2008 7 5.72802e+00 4.09664e+00 44 2008 8 1.54369e+00 4.43062e-01 41 2008 9 1.09861e+01 1.57607e+01 71 2008 10 5.02241e+00 5.95876e+00 163 2008 11 2.00371e+00 9.31326e-01 198 2008 12 8.30167e+00 1.36895e+01 69 2009 1 5.45001e+00 4.29166e+00 107 2009 2 1.12071e+01 1.04428e+01 102 2009 3 2.37898e+00 1.03386e+00 84 2009 4 1.76895e+01 1.99371e+01 66 2009 5 3.79032e+00 1.49529e+00 32 2009 6 2.94118e+00 1.45679e+00 47 2009 7 2.77567e+00 4.90112e-01 15 2009 8 2.32329e+00 1.93740e+00 63 2009 9 5.50416e+00 6.36525e+00 102 2009 10 8.43336e+00 7.78702e+00 143 2009 11 1.29743e+01 1.44738e+01 148 2009 12 1.35649e+01 2.96092e+00 29 2010 1 1.27224e+01 1.62818e+01 117 2010 2 9.50374e+00 5.35254e+00 141 2010 3 1.99807e+01 2.31670e+01 77 2010 4 1.88134e+01 2.01933e+01 100 2010 5 4.46818e+00 2.45610e+00 53 2010 6 5.21676e+00 2.59325e+00 74 2010 7 1.36873e+00 7.27419e-01 57 2010 8 1.31789e+01 1.69553e+01 28 2010 9 3.65336e+00 3.01579e+00 125 2010 10 2.86250e+00 2.73287e+00 236 2010 11 4.33562e+00 2.84027e+00 110 2010 12 4.96913e+00 3.09204e+00 157 2011 1 2.85743e+00 7.92845e-01 131 2011 2 4.64503e+00 2.31900e+00 142 2011 3 2.80560e+00 2.00866e+00 175 2011 4 2.24558e+00 1.00752e+00 81 2011 5 3.16380e+00 2.40556e+00 103 2011 6 3.36660e+00 2.41348e+00 72 2011 7 2.08909e+00 5.81912e-01 32 2011 8 2.62565e+00 8.87709e-01 73 2011 9 5.67834e+00 6.17673e+00 107 2011 10 4.90062e+00 3.80252e+00 228 2011 11 2.49071e+00 1.57969e+00 153 2011 12 2.92068e+00 1.04890e+00 94 2012 1 1.90774e+00 7.38996e-01 173 2012 2 1.16648e+00 3.08071e-01 52 2012 3 2.98751e+00 1.96540e+00 139 2012 4 2.13806e+00 1.39602e+00 93 2012 5 1.33837e+00 1.09603e+00 95 2012 6 2.44512e+00 1.86039e+00 82 2012 7 1.28327e+00 6.29133e-01 45 2012 8 1.26462e+01 1.66655e+01 31 2012 9 9.41475e+00 1.02833e+01 92 2012 10 9.73182e+00 1.43680e+01 198 2012 11 6.42789e+00 7.90443e+00 213 2012 12 3.04098e+00 1.94439e+00 136 2013 1 2.08528e+00 7.79239e-01 102 2013 2 1.64473e+00 3.79757e-01 76 2013 3 8.14241e+00 8.48032e+00 141 2013 4 1.51579e+01 1.09454e+01 28 2013 5 9.72070e+00 1.28190e+01 102 2013 6 4.43484e+00 1.13663e+00 20 2013 7 1.00380e+01 1.04558e+01 45 2013 8 1.15133e+01 7.25078e+00 64 2013 9 1.28316e+01 1.25662e+01 86 2013 10 8.78967e+00 1.15355e+01 120 2013 11 4.48066e+00 2.08103e+00 132 2013 12 5.56214e+00 4.91153e+00 83 2014 1 8.55021e+00 5.96052e+00 135 2014 2 4.37179e+00 2.09714e+00 77 2014 3 7.07582e+00 3.38775e+00 131 2014 4 1.91619e+01 1.56649e+01 60 2014 5 1.56756e+01 1.83649e+01 50 2014 6 4.81002e+00 1.03446e+01 31 2014 7 3.80404e+00 4.32711e+00 33 2014 8 2.24339e+00 9.54662e-01 30 2014 9 1.06540e+00 5.04572e-01 86 2014 10 3.56872e+00 5.47018e+00 271 2014 11 2.01581e+00 8.81394e-01 166 2014 12 3.70372e+00 2.09934e+00 92 2015 1 7.69053e+00 5.64262e+00 136 2015 2 4.05843e+00 4.22331e+00 137 2015 3 3.32220e+00 1.31754e+00 83 2015 4 1.74402e+00 7.75265e-01 46 2015 5 3.18923e+00 3.04169e+00 102 2015 6 3.38230e+00 4.06998e+00 89 2015 7 2.38292e+00 5.44154e-01 36 2015 8 1.33994e+00 6.08514e-01 58 2015 9 2.76249e+00 1.70107e+00 96 2015 10 1.18005e+01 9.38630e+00 156 2015 11 1.76735e+01 1.62980e+01 91 2015 12 3.02977e+01 3.64745e+01 39 2016 1 1.28420e+01 6.78261e+00 96 2016 2 1.20835e+01 5.89790e+00 156 2016 3 8.18823e+00 5.38112e+00 72 2016 4 1.91167e+01 1.85494e+01 61 2016 5 1.26890e+01 1.81010e+01 70 2016 6 2.62005e+00 1.19559e+00 80 2016 7 2.61205e+00 1.22006e+00 58 2016 8 2.30533e+00 2.24216e+00 72 2016 9 3.39825e+00 1.98502e+00 100 2016 10 1.98446e+00 1.15052e+00 247 2016 11 2.21732e+00 9.01295e-01 121 2016 12 3.57921e+00 2.83380e+00 100 2017 1 7.50388e+00 4.51504e+00 119 2017 2 1.57591e+01 1.65511e+01 168 2017 3 7.57292e+00 7.14345e+00 130 2017 4 2.55244e+00 1.31342e+00 108 2017 5 2.64774e+00 1.78625e+00 114 2017 6 1.80519e+00 3.86031e-01 22 2017 7 4.10083e+00 2.53811e+00 73 2017 8 8.10762e+00 4.93922e+00 20 2017 9 1.08704e+01 2.27835e+01 66 2017 10 4.33608e+00 3.19337e+00 160 2017 11 3.35401e+00 1.44386e+00 140 2017 12 1.97269e+00 6.89961e-01 99 2018 1 1.36739e+00 5.75963e-01 113 2018 2 2.42766e+00 1.80983e+00 54 2018 3 6.48106e+00 1.12689e+01 143 2018 4 1.96008e+00 1.30346e+00 100 2018 5 1.26849e+00 3.78960e-01 30 2018 6 2.30871e+00 9.32056e-01 63 2018 7 2.14079e+00 1.08355e+00 56 2018 8 5.85318e+00 3.79950e+00 69 2018 9 1.06661e+01 1.97183e+01 123 2018 10 1.43987e+01 1.30854e+01 233 2018 11 1.81563e+01 2.74039e+01 42 2018 12 1.09536e+01 4.36100e+00 66 2019 1 1.07725e+01 4.45967e+00 89 2019 2 8.81836e+00 5.92244e+00 32 2019 3 1.37673e+01 1.23338e+01 144 2019 4 3.53091e+00 2.03057e+00 74 2019 5 4.97779e+00 7.21861e+00 171 2019 6 2.89769e+00 1.99077e+00 48 2019 7 1.92380e+01 1.56701e+01 27 2019 8 1.74939e+00 4.09689e-01 32 2019 9 2.68873e+00 1.13763e+00 138 2019 10 2.43705e+00 1.13797e+00 95 2019 11 2.82483e+00 1.06032e+00 93 2019 12 5.11943e+00 1.12634e+01 69 2020 1 5.26166e+00 6.74349e+00 91 2020 2 3.83065e+00 3.07602e+00 118 2020 3 1.22234e+01 1.93970e+01 61 2020 4 1.29137e+01 1.70859e+01 84 2020 5 6.91794e+00 4.64761e+00 76 2020 6 1.93698e+00 5.96336e-01 57 2020 7 1.79155e+00 6.56764e-01 41 2020 8 1.98356e+00 6.84633e-01 16 2020 9 2.23586e+01 2.27496e+01 47 2020 10 1.40024e+01 1.49581e+01 113 2020 11 2.03888e+01 1.58481e+01 113 2020 12 6.15891e+00 2.74048e+00 154 2021 1 7.26965e+00 3.65453e+00 54 2021 2 3.23843e+00 1.44107e+00 110 2021 3 1.42388e+01 1.74489e+01 99 2021 4 2.79418e+00 1.09071e+00 107 2021 5 5.27395e+00 2.87622e+00 68 2021 6 nan nan 0 2021 7 1.45992e+01 1.75736e+01 51 2021 8 3.58507e+00 3.69713e+00 49 2021 9 2.61890e+01 2.64016e+01 47 2021 10 2.95951e+01 3.16681e+01 34 2021 11 8.89770e+00 6.84343e+00 188 2021 12 4.45027e+00 3.97560e+00 92 2022 1 4.45198e+00 3.75262e+00 147 2022 2 2.29559e+00 9.48625e-01 130 2022 3 1.65108e+00 1.28199e+00 144 2022 4 3.52771e+00 2.86406e+00 36 2022 5 2.23429e+00 1.92088e+00 57 2022 6 1.47432e+00 1.02649e+00 55 2022 7 1.17278e+00 6.58053e-01 89 2022 8 3.12257e+00 2.78164e+00 86 2022 9 8.33571e+00 1.55086e+01 167 2022 10 3.72186e+00 3.66057e+00 257 2022 11 3.34897e+00 2.88248e+00 193 2022 12 2.82269e+00 2.51233e+00 139 2023 1 2.76517e+00 1.28991e+00 173 2023 2 3.09578e+00 1.33765e+00 159 2023 3 3.60659e+00 2.66595e+00 50 2023 4 1.43939e+00 8.43288e-01 64 2023 5 1.24042e+00 5.77229e-01 78 2023 6 9.43805e-01 3.68429e-01 31 2023 7 4.84048e+00 5.16495e+00 64 2023 8 2.90508e+00 1.36151e+00 80 2023 9 4.38099e+00 2.66890e+00 80 2023 10 5.43585e+00 4.64875e+00 202 2023 11 3.89225e+00 2.36410e+00 130 2023 12 6.01788e+00 9.72246e+00 79 2024 1 4.52796e+00 2.23738e+00 93 2024 2 7.23253e+00 6.74461e+00 109 2024 3 6.30976e+00 5.97191e+00 110 2024 4 9.45774e+00 1.31326e+00 31