JanFebMarAprMayJunJulAugSepOctNovDec
18.78.3-1.79.613.420.930.524.124.211.412.2 
213.28.61.111.510.923.930.629.424.419.111.8 
311.36.36.212.716.826.728.931.326.420.613.2 
412.86.310.711.619.021.624.928.923.216.212.4 
58.64.69.512.124.617.027.828.321.921.216.4 
65.73.710.115.326.823.730.630.820.111.915.5 
75.35.110.316.628.218.730.427.219.314.313.8 
84.27.811.212.321.322.031.222.618.316.313.8 
99.27.59.910.818.321.329.822.222.820.013.5 
109.710.412.713.316.824.125.419.720.322.912.4 
117.010.312.512.916.926.126.219.320.618.613.3 
128.68.011.610.414.021.326.618.116.619.314.3 
138.36.912.712.119.022.525.523.619.221.413.6 
146.710.212.419.121.221.627.324.118.715.014.6 
1512.110.313.613.223.821.730.422.421.413.214.8 
167.010.113.115.018.120.127.821.321.816.613.1 
179.910.27.314.919.217.622.221.922.814.510.7 
1812.18.40.823.019.223.124.321.620.315.811.4 
197.612.54.428.021.223.728.226.020.716.8  
209.410.48.824.122.124.326.724.720.118.7  
2112.18.69.823.424.620.126.925.817.518.9  
2211.26.610.221.223.224.031.023.612.714.1  
2312.46.211.815.622.225.629.722.413.915.6  
2412.66.99.217.115.227.128.917.816.118.8  
2510.16.412.713.719.629.330.219.818.412.6  
268.32.313.213.426.829.831.317.922.910.9  
2711.11.713.612.125.629.027.419.223.46.9  
2812.3-0.29.610.224.227.821.622.017.39.4  
2911.78.49.518.528.518.621.719.79.4  
3010.36.912.318.129.921.320.715.79.2  
319.87.222.423.422.513.1 
Avg: 9.77.39.314.920.423.827.323.320.015.6* 13.4 
Hi: 13.212.513.628.028.229.931.331.326.422.9* 16.4 
Lo: 4.2-0.2-1.79.510.917.018.617.812.76.9* 10.7 
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20189.77.39.314.920.423.827.323.320.015.6* 13.4 
20177.79.713.515.619.222.623.121.718.416.511.68.7
20169.69.511.314.219.621.424.124.221.815.710.310.0
20159.68.211.716.917.622.122.821.919.615.813.413.6
201410.310.613.716.018.623.426.021.922.017.012.29.6
20137.57.17.613.017.320.626.924.220.517.410.610.4
2012        * 19.715.010.89.2
Avg9.18.711.215.118.822.325.022.8* 20.316.1* 11.810.2