JanFebMarAprMayJunJulAugSepOctNovDec
18.7           
213.2           
311.3           
412.8           
58.6           
65.7           
75.3           
84.2           
99.2           
109.7           
117.0           
128.6           
138.3           
146.7           
1512.1           
167.0           
179.9           
1812.1           
197.6           
209.4           
2112.1           
2211.2           
23            
24            
25            
26            
27            
28            
29           
30           
31       
Avg: * 9.1           
Hi: * 13.2           
Lo: * 4.2           
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
2018* 9.1           
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
Avg* 9.09.011.615.218.422.024.622.8* 20.316.211.510.2