JanFebMarAprMayJunJulAugSepOctNovDec
18.2           
211.0           
311.2           
48.4           
58.9           
69.8           
712.3           
812.0           
912.1           
108.4           
1111.4           
1211.3           
1310.7           
1412.7           
1511.6           
1611.9           
1710.2           
186.6           
196.9           
207.3           
21            
22            
23            
24            
25            
26            
27            
28            
29            
30           
31       
Avg: * 10.1           
Hi: * 12.7           
Lo: * 6.6           
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20197.511.612.815.918.220.825.023.220.114.910.39.7
20189.77.39.314.920.423.827.323.320.015.611.910.5
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
Avg8.89.111.415.218.722.125.022.9* 20.316.011.410.2