JanFebMarAprMayJunJulAugSepOctNovDec
111.42.712.913.314.720.820.324.7    
27.15.713.210.313.818.922.123.7    
35.39.212.98.816.519.321.622.0    
44.811.910.49.212.916.422.221.8    
53.311.011.69.212.817.124.923.4    
67.910.412.214.113.116.724.721.3    
710.610.111.813.213.817.123.822.2    
810.811.711.113.313.917.921.719.2    
96.611.312.313.514.116.823.519.8    
106.38.711.612.715.116.823.720.8    
118.310.512.710.916.912.623.121.3    
1210.510.210.410.216.315.323.619.8    
1311.911.811.110.515.015.821.519.5    
149.410.412.99.216.917.922.421.4    
1510.811.813.711.717.018.421.021.1    
1611.4 11.513.316.618.321.717.5    
176.612.310.416.213.117.822.921.9    
188.211.3 19.815.916.622.120.9    
199.811.4 22.918.618.619.520.3    
207.411.113.623.619.118.123.120.2    
217.412.613.522.319.619.622.619.9    
226.610.711.518.819.019.121.822.3    
237.013.212.218.718.419.825.9     
248.414.013.313.119.121.723.0     
2511.414.813.513.220.623.425.9     
2610.813.914.413.519.623.923.8     
278.314.915.012.718.026.924.1     
288.213.915.413.017.325.423.7     
296.414.013.817.624.621.8     
304.717.013.821.623.020.2     
315.514.318.421.3   
Avg: 8.2* 11.2* 12.814.016.619.222.7* 21.1    
Hi: 11.9* 14.9* 17.023.621.626.925.9* 24.7    
Lo: 3.3* 2.7* 10.48.812.812.619.5* 17.5    
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20198.2* 11.2* 12.814.016.619.222.7* 21.1    
201810.17.69.014.018.622.424.821.919.415.312.011.4
20178.710.112.514.417.420.421.620.518.016.211.79.6
201610.29.611.212.817.919.621.722.120.115.210.810.6
20159.98.411.115.215.819.920.619.918.115.313.413.3
20149.99.912.114.116.320.723.320.120.816.312.69.7
20138.17.17.511.515.118.623.822.019.016.410.410.4
201210.18.613.412.117.017.319.420.417.914.310.99.5
20117.410.511.917.416.418.620.019.719.116.913.810.5
20105.47.310.113.916.221.021.220.318.215.110.04.1
20097.18.312.014.217.120.019.720.319.116.012.57.5
200810.610.610.812.818.419.220.219.518.314.311.07.7
2007         * 15.311.99.4
Avg8.8* 9.1* 11.213.916.919.721.6* 20.618.9* 15.611.89.5