JanFebMarAprMayJunJulAugSepOctNovDec
18.78.3-1.79.6        
213.28.61.111.5        
311.36.36.212.7        
412.86.310.711.6        
58.64.69.512.1        
65.73.710.115.3        
75.35.110.316.6        
84.27.811.212.3        
99.27.59.910.8        
109.710.412.713.3        
117.010.312.512.9        
128.68.011.610.4        
138.36.912.712.1        
146.710.212.419.1        
1512.110.313.613.2        
167.010.113.115.0        
179.910.27.314.9        
1812.18.40.823.0        
197.612.54.428.0        
209.410.48.824.1        
2112.18.69.823.4        
2211.26.610.2         
2312.46.211.8         
2412.66.99.2         
2510.16.412.7         
268.32.313.2         
2711.11.713.6         
2812.3-0.29.6         
2911.78.4         
3010.36.9         
319.87.2     
Avg: 9.77.39.3* 15.3        
Hi: 13.212.513.6* 28.0        
Lo: 4.2-0.2-1.7* 9.6        
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20189.77.39.3* 15.3        
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
Avg9.18.711.2* 15.218.422.024.622.8* 20.316.211.510.2