JanFebMarAprMayJunJulAugSepOctNovDec
111.811.27.513.7        
29.412.19.112.9        
313.012.27.710.9        
413.89.95.911.5        
513.49.95.810.5        
612.39.29.714.2        
711.98.97.013.9        
89.18.55.613.2        
99.611.312.413.0        
1013.310.410.316.1        
1111.411.310.611.1        
1212.89.413.19.9        
1310.49.613.013.1        
1412.811.610.610.3        
157.112.314.715.9        
166.514.910.313.0        
173.515.513.515.1        
185.713.814.316.4        
196.712.912.516.8        
207.311.711.816.8        
215.98.915.212.5        
227.39.713.7         
237.25.613.4         
246.310.313.4         
256.47.513.9         
268.59.312.1         
275.78.411.2         
285.39.511.1         
2911.312.1         
309.815.5         
3111.812.4     
Avg: 9.310.611.3* 13.4        
Hi: 13.815.515.5* 16.8        
Lo: 3.55.65.6* 9.9        
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20239.310.611.3* 13.4        
20229.311.312.514.717.620.723.725.019.517.7* 13.5* 8.4
20217.69.311.813.014.620.322.720.320.316.311.710.8
202010.111.111.616.418.819.921.222.319.814.712.89.4
20198.2* 11.2* 12.814.016.619.222.721.719.414.910.810.5
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
Avg8.9* 9.5* 11.3* 14.016.919.921.821.119.1* 15.6* 11.9* 9.5