JanFebMarAprMayJunJulAugSepOctNovDec
18.78.3-1.79.613.420.9      
213.28.61.111.510.923.9      
311.36.36.212.716.826.7      
412.86.310.711.619.021.6      
58.64.69.512.124.617.0      
65.73.710.115.326.823.7      
75.35.110.316.628.218.7      
84.27.811.212.321.322.0      
99.27.59.910.818.321.3      
109.710.412.713.316.824.1      
117.010.312.512.916.926.1      
128.68.011.610.414.021.3      
138.36.912.712.119.022.5      
146.710.212.419.121.221.6      
1512.110.313.613.223.821.7      
167.010.113.115.018.120.1      
179.910.27.314.919.217.6      
1812.18.40.823.019.223.1      
197.612.54.428.021.223.7      
209.410.48.824.122.124.3      
2112.18.69.823.424.620.1      
2211.26.610.221.223.2       
2312.46.211.815.622.2       
2412.66.99.217.115.2       
2510.16.412.713.719.6       
268.32.313.213.426.8       
2711.11.713.612.125.6       
2812.3-0.29.610.224.2       
2911.78.49.518.5       
3010.36.912.318.1       
319.87.222.4    
Avg: 9.77.39.314.920.4* 22.0      
Hi: 13.212.513.628.028.2* 26.7      
Lo: 4.2-0.2-1.79.510.9* 17.0      
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20189.77.39.314.920.4* 22.0      
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
Avg9.18.711.215.118.8* 22.024.622.8* 20.316.211.510.2