JanFebMarAprMayJunJulAugSepOctNovDec
111.42.7          
27.15.7          
35.39.2          
44.811.9          
53.311.0          
67.910.4          
710.610.1          
810.811.7          
96.611.3          
106.38.7          
118.310.5          
1210.510.2          
1311.911.8          
149.410.4          
1510.811.8          
1611.4           
176.6           
188.2           
199.8           
207.4           
217.4           
226.6           
237.0           
248.4           
2511.4           
2610.8           
278.3           
288.2           
296.4          
304.7          
315.5      
Avg: 8.2* 9.8          
Hi: 11.9* 11.9          
Lo: 3.3* 2.7          
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20198.2* 9.8          
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* 9.011.013.816.919.821.520.618.9* 15.611.89.5