JanFebMarAprMayJunJulAugSepOctNovDec
111.81.712.217.716.425.5      
26.04.813.311.616.021.7      
35.68.311.710.215.320.3      
43.910.310.011.113.618.9      
55.69.811.911.713.318.2      
69.311.312.913.914.619.2      
710.910.711.817.215.618.3      
89.710.410.317.716.317.5      
96.511.113.711.015.220.2      
107.28.710.215.017.7       
119.610.111.614.918.2       
1210.811.89.813.218.8       
1312.211.911.511.119.1       
1410.612.314.011.321.2       
159.915.214.714.420.7       
1610.011.411.715.219.6       
176.112.311.119.214.3       
186.89.411.622.916.6       
197.010.913.525.620.1       
205.512.013.126.419.2       
217.813.614.124.922.1       
224.98.711.122.921.9       
235.414.913.623.322.9       
246.416.415.114.622.6       
2512.718.414.614.922.6       
2610.817.515.115.220.6       
277.818.615.613.819.3       
286.913.216.215.819.2       
297.317.617.820.2       
305.919.218.321.7       
315.114.420.7    
Avg: 7.911.613.116.418.6* 20.0      
Hi: 12.718.619.226.422.9* 25.5      
Lo: 3.91.79.810.213.3* 17.5      
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20197.911.613.116.418.6* 20.0      
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* 12.015.618.9* 21.824.6* 23.0* 20.4* 16.3* 11.810.8