JanFebMarAprMayJunJulAugSepOctNovDec
111.81.712.2         
26.04.813.3         
35.68.311.7         
43.910.310.0         
55.69.811.9         
69.311.312.9         
710.910.711.8         
89.710.410.3         
96.511.113.7         
107.28.710.2         
119.610.111.6         
1210.811.89.8         
1312.211.911.5         
1410.612.314.0         
159.915.214.7         
1610.011.411.7         
176.112.311.1         
186.89.411.6         
197.010.913.5         
205.512.0          
217.813.6          
224.98.7          
235.414.9          
246.416.4          
2512.718.4          
2610.817.5          
277.818.6          
286.913.2          
297.3          
305.9          
315.1      
Avg: 7.911.6* 12.0         
Hi: 12.718.6* 14.7         
Lo: 3.91.7* 9.8         
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20197.911.6* 12.0         
201810.07.79.915.121.023.927.523.420.316.312.410.8
2017* 8.710.4* 14.315.919.122.423.021.718.616.811.89.4
201610.210.111.914.019.520.923.224.121.616.711.610.8
20159.98.912.217.117.321.622.3* 21.5* 20.4 * 12.313.8
201410.310.914.316.518.923.626.722.221.9* 16.912.810.1
20137.77.58.114.017.821.627.924.720.217.010.810.6
2012     * 20.521.423.219.714.411.210.0
Avg* 9.29.6* 11.815.418.9* 22.124.6* 23.0* 20.4* 16.3* 11.810.8