JanFebMarAprMayJunJulAugSepOctNovDec
111.41.711.317.315.424.621.425.8    
24.94.413.111.115.621.423.027.7    
35.08.211.910.014.719.824.423.3    
42.811.210.37.313.220.427.225.5    
53.79.911.610.914.418.126.424.2    
69.311.112.113.214.418.727.122.0    
710.810.211.815.916.919.625.223.4    
89.810.510.617.215.316.924.022.5    
95.910.613.510.714.818.726.122.3    
107.48.310.914.216.413.826.120.8    
118.89.711.314.917.314.924.221.6    
1210.311.39.612.918.417.325.920.4    
1312.211.611.310.819.814.124.921.4    
149.513.613.410.821.018.224.018.1    
159.813.414.214.322.018.425.321.7    
1610.211.311.714.320.119.225.217.6    
175.512.110.419.314.619.823.922.2    
186.49.810.423.116.617.622.921.2    
196.511.512.624.420.119.518.320.7    
204.612.112.925.318.916.624.0     
217.112.413.725.921.521.323.2     
226.810.311.024.821.723.726.4     
234.516.912.922.623.223.532.8     
246.116.614.314.421.826.328.4     
2512.118.813.814.622.824.832.1     
2610.117.714.615.019.424.025.0     
278.117.315.212.818.326.423.4     
286.512.516.415.217.529.623.8     
297.217.917.615.132.525.5     
305.119.817.422.423.520.6     
314.613.620.223.1   
Avg: 7.511.612.815.918.220.825.0* 22.2    
Hi: 12.218.819.825.923.232.532.8* 27.7    
Lo: 2.81.79.67.313.213.818.3* 17.6    
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20197.511.612.815.918.220.825.0* 22.2    
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
Avg8.89.111.415.218.722.125.0* 22.8* 20.316.111.610.3