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 6.13330e+01 6.87173e-01 28 2002 8 5.75775e+01 9.38707e-01 63 2002 9 4.78018e+01 1.20220e+00 49 2002 10 4.27516e+01 2.74206e+00 94 2002 11 3.23319e+01 1.64877e+00 101 2002 12 2.88840e+01 3.37964e-01 96 2003 1 3.06019e+01 1.53283e+00 156 2003 2 3.78959e+01 2.08891e+00 118 2003 3 4.97124e+01 2.53422e+00 89 2003 4 5.66969e+01 2.43229e+00 68 2003 5 6.20347e+01 6.89937e-01 22 2003 6 6.21586e+01 1.70214e-01 29 2003 7 6.19357e+01 3.60671e-01 25 2003 8 5.56188e+01 9.15614e-01 39 2003 9 5.19166e+01 2.09324e+00 79 2003 10 4.15215e+01 3.08395e+00 169 2003 11 3.29934e+01 2.06799e+00 154 2003 12 2.89181e+01 5.02978e-01 116 2004 1 3.14839e+01 1.56815e+00 91 2004 2 4.01676e+01 2.32974e+00 61 2004 3 4.95593e+01 2.27688e+00 136 2004 4 5.66382e+01 2.26601e+00 112 2004 5 6.17116e+01 1.02888e+00 87 2004 6 6.22936e+01 1.30996e-02 16 2004 7 6.17355e+01 6.44223e-01 31 2004 8 5.83452e+01 1.21069e+00 28 2004 9 5.13632e+01 2.31714e+00 73 2004 10 4.15977e+01 3.19391e+00 79 2004 11 3.32339e+01 2.15363e+00 126 2004 12 2.87945e+01 4.22020e-01 126 2005 1 3.24078e+01 1.33813e+00 103 2005 2 3.82694e+01 1.80481e+00 48 2005 3 4.58319e+01 1.09740e+00 111 2005 4 5.73764e+01 1.17563e+00 60 2005 5 6.16800e+01 4.79616e-01 41 2005 6 6.27226e+01 2.92419e-01 47 2005 7 6.11944e+01 5.00040e-01 63 2005 8 5.48035e+01 4.60682e-02 16 2005 9 5.15708e+01 2.66517e+00 80 2005 10 4.17509e+01 2.31731e+00 240 2005 11 3.27514e+01 1.85683e+00 163 2005 12 2.89264e+01 6.00493e-01 50 2006 1 3.22740e+01 1.85359e+00 105 2006 2 3.93474e+01 2.60577e+00 153 2006 3 4.78146e+01 3.10957e+00 140 2006 4 5.69722e+01 1.44523e+00 97 2006 5 6.21799e+01 4.89506e-01 107 2006 6 6.22330e+01 6.53412e-02 52 2006 7 6.20228e+01 2.18849e-02 16 2006 8 5.53360e+01 1.10702e+00 17 2006 9 5.04764e+01 2.91604e+00 109 2006 10 4.17633e+01 3.09263e+00 127 2006 11 3.34561e+01 1.91544e+00 197 2006 12 2.92190e+01 5.86693e-01 115 2007 1 3.20488e+01 1.80163e+00 86 2007 2 3.87684e+01 1.78444e+00 113 2007 3 4.81975e+01 2.71504e+00 136 2007 4 5.71053e+01 1.23462e+00 96 2007 5 6.10227e+01 7.19660e-01 48 2007 6 6.22913e+01 2.02139e-01 42 2007 7 6.18301e+01 5.82730e-01 49 2007 8 5.81091e+01 1.25507e+00 48 2007 9 5.01043e+01 2.59651e+00 84 2007 10 4.21685e+01 3.19620e+00 166 2007 11 3.34861e+01 2.19383e+00 162 2007 12 2.91268e+01 3.39339e-01 81 2008 1 3.15852e+01 1.70646e+00 98 2008 2 3.94334e+01 3.19246e+00 119 2008 3 4.86586e+01 2.81384e+00 133 2008 4 5.84682e+01 8.54890e-01 95 2008 5 6.20365e+01 8.69291e-01 92 2008 6 6.24493e+01 2.45020e-01 85 2008 7 6.17164e+01 9.48087e-01 44 2008 8 5.71059e+01 2.12400e+00 41 2008 9 5.05226e+01 2.42082e+00 71 2008 10 3.99742e+01 2.73378e+00 163 2008 11 3.34227e+01 1.79232e+00 198 2008 12 2.90419e+01 4.91558e-01 69 2009 1 3.15964e+01 1.68122e+00 107 2009 2 3.77197e+01 2.15846e+00 102 2009 3 4.79635e+01 2.50033e+00 88 2009 4 5.78381e+01 1.72719e+00 75 2009 5 6.22003e+01 7.61476e-01 32 2009 6 6.22742e+01 1.75658e-01 47 2009 7 6.16117e+01 3.23639e-01 15 2009 8 5.83698e+01 1.17371e+00 63 2009 9 4.83481e+01 2.09330e+00 102 2009 10 4.15409e+01 2.17581e+00 146 2009 11 3.38661e+01 1.80248e+00 152 2009 12 2.91072e+01 3.87038e-01 29 2010 1 3.07501e+01 1.54026e+00 121 2010 2 3.97036e+01 2.21740e+00 141 2010 3 4.70602e+01 2.86555e+00 90 2010 4 5.73827e+01 1.65702e+00 104 2010 5 6.19400e+01 9.59677e-01 53 2010 6 6.22546e+01 1.10899e-01 74 2010 7 6.11834e+01 7.41144e-01 57 2010 8 5.69456e+01 5.16952e-01 28 2010 9 5.03504e+01 2.25022e+00 128 2010 10 4.25417e+01 2.67827e+00 242 2010 11 3.44035e+01 9.44685e-01 110 2010 12 2.90672e+01 4.72973e-01 157 2011 1 3.11241e+01 1.78303e+00 131 2011 2 4.00333e+01 1.97766e+00 142 2011 3 4.85961e+01 2.23423e+00 175 2011 4 5.63896e+01 2.01360e+00 81 2011 5 6.21565e+01 6.54752e-01 103 2011 6 6.24855e+01 3.07285e-01 72 2011 7 6.12549e+01 1.04519e+00 32 2011 8 5.65706e+01 1.31799e+00 73 2011 9 5.04831e+01 2.31283e+00 107 2011 10 4.18206e+01 2.65545e+00 228 2011 11 3.37412e+01 2.25409e+00 153 2011 12 2.90236e+01 5.89463e-01 94 2012 1 3.10900e+01 1.92235e+00 173 2012 2 3.88691e+01 1.08580e+00 52 2012 3 4.94992e+01 2.55896e+00 139 2012 4 5.75973e+01 2.49306e+00 93 2012 5 6.14943e+01 8.78169e-01 95 2012 6 6.25643e+01 3.48499e-01 82 2012 7 6.15920e+01 4.78980e-01 45 2012 8 5.67604e+01 8.71057e-01 32 2012 9 5.05868e+01 2.86240e+00 99 2012 10 4.14732e+01 2.68841e+00 209 2012 11 3.34512e+01 1.96835e+00 215 2012 12 2.89932e+01 4.41650e-01 136 2013 1 3.27541e+01 1.42778e+00 102 2013 2 3.73557e+01 1.96825e+00 76 2013 3 4.89378e+01 3.00768e+00 141 2013 4 5.64272e+01 1.60771e+00 51 2013 5 6.18185e+01 8.85622e-01 106 2013 6 6.30350e+01 2.48734e-01 20 2013 7 6.17271e+01 3.04819e-01 48 2013 8 5.69898e+01 1.16188e+00 64 2013 9 5.00634e+01 2.75318e+00 92 2013 10 4.20196e+01 2.61305e+00 130 2013 11 3.30510e+01 2.34276e+00 132 2013 12 2.89639e+01 4.87391e-01 83 2014 1 3.11835e+01 1.66643e+00 135 2014 2 3.89694e+01 1.65616e+00 77 2014 3 4.88484e+01 3.03423e+00 131 2014 4 5.65825e+01 1.98171e+00 60 2014 5 6.17064e+01 7.91271e-01 61 2014 6 6.23721e+01 1.17177e-01 41 2014 7 6.15408e+01 1.05912e+00 33 2014 8 5.81582e+01 1.42474e+00 30 2014 9 5.11019e+01 1.73492e+00 86 2014 10 4.11992e+01 2.76295e+00 275 2014 11 3.33174e+01 2.25587e+00 166 2014 12 2.88282e+01 2.33368e-01 96 2015 1 3.21181e+01 1.67874e+00 136 2015 2 3.78539e+01 1.67530e+00 137 2015 3 4.85515e+01 1.90693e+00 83 2015 4 5.58295e+01 1.85319e+00 46 2015 5 6.15121e+01 1.00054e+00 102 2015 6 6.22877e+01 1.54935e-01 89 2015 7 6.15979e+01 6.38271e-01 36 2015 8 5.67393e+01 1.77254e+00 58 2015 9 4.98581e+01 2.09804e+00 96 2015 10 4.16931e+01 1.87549e+00 158 2015 11 3.35554e+01 1.90293e+00 92 2015 12 2.88201e+01 3.74280e-01 42 2016 1 3.15244e+01 1.74256e+00 96 2016 2 3.93943e+01 2.47569e+00 156 2016 3 4.71127e+01 2.23586e+00 72 2016 4 5.59592e+01 1.58858e+00 61 2016 5 6.15858e+01 8.20653e-01 83 2016 6 6.25771e+01 2.57718e-01 80 2016 7 6.15614e+01 5.67709e-01 58 2016 8 5.65510e+01 9.80101e-01 73 2016 9 5.03335e+01 3.11264e+00 100 2016 10 4.17470e+01 2.68198e+00 247 2016 11 3.23246e+01 1.12803e+00 121 2016 12 2.92164e+01 5.42876e-01 100 2017 1 3.18553e+01 2.04150e+00 119 2017 2 3.98445e+01 2.65848e+00 169 2017 3 4.94028e+01 2.45897e+00 130 2017 4 5.67568e+01 2.01127e+00 108 2017 5 6.18708e+01 7.59189e-01 114 2017 6 6.23235e+01 8.42357e-02 22 2017 7 6.16043e+01 8.44745e-01 73 2017 8 5.74455e+01 4.93107e-02 20 2017 9 4.96555e+01 2.73975e+00 73 2017 10 4.08300e+01 2.89657e+00 160 2017 11 3.36266e+01 1.96115e+00 140 2017 12 2.91752e+01 4.53140e-01 99 2018 1 3.18868e+01 1.63211e+00 113 2018 2 3.78591e+01 1.21818e+00 54 2018 3 4.85512e+01 2.82252e+00 146 2018 4 5.79927e+01 1.35735e+00 100 2018 5 6.06774e+01 4.23550e-01 30 2018 6 6.22567e+01 7.85756e-02 63 2018 7 6.17126e+01 6.20246e-01 56 2018 8 5.83142e+01 1.71441e+00 69 2018 9 5.09099e+01 2.43121e+00 133 2018 10 4.17883e+01 2.92219e+00 238 2018 11 3.33291e+01 1.35359e+00 44 2018 12 2.90516e+01 4.54598e-01 66 2019 1 3.08774e+01 1.55219e+00 97 2019 2 4.10151e+01 2.33520e+00 32 2019 3 5.01609e+01 2.85691e+00 144 2019 4 5.89261e+01 9.71107e-01 74 2019 5 6.18644e+01 7.75847e-01 176 2019 6 6.22347e+01 7.77825e-02 48 2019 7 6.12189e+01 3.51878e-01 27 2019 8 5.73556e+01 2.04797e+00 32 2019 9 5.07934e+01 2.80118e+00 139 2019 10 4.20236e+01 2.63182e+00 95 2019 11 3.40285e+01 2.25340e+00 93 2019 12 2.89960e+01 4.77386e-01 69 2020 1 3.09558e+01 1.70727e+00 93 2020 2 3.93358e+01 3.11647e+00 118 2020 3 4.84661e+01 3.16773e+00 71 2020 4 5.74852e+01 2.28618e+00 84 2020 5 6.11741e+01 8.53503e-01 85 2020 6 6.24009e+01 1.98074e-01 57 2020 7 6.16733e+01 3.46458e-01 41 2020 8 6.00614e+01 6.35269e-03 16 2020 9 5.12210e+01 2.45465e+00 47 2020 10 4.00560e+01 2.94052e+00 120 2020 11 3.36002e+01 1.78475e+00 113 2020 12 2.89466e+01 4.10902e-01 154 2021 1 3.07699e+01 1.52525e+00 54 2021 2 3.95763e+01 2.77163e+00 110 2021 3 4.75297e+01 2.63635e+00 101 2021 4 5.65136e+01 2.15776e+00 122 2021 5 6.25470e+01 5.68076e-01 68 2021 6 nan nan 0 2021 7 6.11020e+01 4.17762e-01 55 2021 8 5.87047e+01 8.44637e-01 49 2021 9 5.07157e+01 2.88843e+00 47 2021 10 3.98634e+01 1.76364e+00 54 2021 11 3.30704e+01 1.94679e+00 192 2021 12 2.89355e+01 5.29646e-01 92 2022 1 3.24281e+01 1.73132e+00 147 2022 2 3.91416e+01 2.41701e+00 130 2022 3 4.88132e+01 3.05093e+00 144 2022 4 5.93381e+01 6.10408e-01 36 2022 5 6.22830e+01 8.79569e-01 57 2022 6 6.24021e+01 1.52002e-01 55 2022 7 6.17699e+01 6.50634e-01 89 2022 8 5.69818e+01 2.09686e+00 86 2022 9 4.93534e+01 1.47962e+00 167 2022 10 4.22338e+01 2.55051e+00 257 2022 11 3.40299e+01 2.02427e+00 193 2022 12 2.89550e+01 4.63605e-01 139 2023 1 3.10871e+01 1.87932e+00 173 2023 2 3.88319e+01 2.44574e+00 159 2023 3 4.94103e+01 1.53548e+00 50 2023 4 5.85218e+01 5.87118e-01 64 2023 5 6.17236e+01 9.01585e-01 78 2023 6 6.23350e+01 1.38468e-01 31 2023 7 6.08998e+01 7.57422e-01 64 2023 8 5.72648e+01 1.64207e+00 80 2023 9 5.01767e+01 2.50000e+00 80 2023 10 4.10226e+01 2.36647e+00 202 2023 11 3.37956e+01 2.25785e+00 137 2023 12 2.87443e+01 3.41254e-01 83 2024 1 3.16328e+01 1.85162e+00 93 2024 2 4.06636e+01 1.99199e+00 109 2024 3 4.99968e+01 3.11801e+00 110 2024 4 5.45640e+01 3.58667e-01 31