JanFebMarAprMayJunJulAugSepOctNovDec
18.211.7          
211.013.4          
311.211.2          
48.49.2          
58.910.4          
69.89.3          
712.310.9          
812.011.2          
912.112.2          
108.49.9          
1111.47.8          
1211.38.9          
1310.710.6          
1412.711.1          
1511.612.1          
1611.912.6          
1710.210.1          
186.610.3          
196.910.2          
207.310.4          
216.810.4          
227.013.5          
237.114.7          
246.711.3          
257.98.2          
269.88.4          
279.79.2          
287.2           
2910.1           
3012.3          
3111.4      
Avg: 9.6* 10.7          
Hi: 12.7* 14.7          
Lo: 6.6* 7.8          
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