JanFebMarAprMayJunJulAugSepOctNovDec
11.59.111.916.712.423.422.720.818.1   
23.613.18.713.413.419.420.119.118.7   
34.310.610.911.812.118.721.319.921.6   
45.29.98.314.512.918.719.721.121.3   
54.110.88.39.812.118.917.618.422.6   
63.77.88.18.613.320.020.319.825.6   
73.84.57.38.213.419.219.618.227.5   
83.83.310.312.013.819.221.920.223.6   
91.70.810.612.514.620.818.819.619.4   
104.73.511.711.615.521.319.320.920.1   
119.93.211.410.513.321.916.620.220.1   
1210.93.810.311.913.923.221.720.419.6   
1311.04.29.212.511.924.024.121.819.6   
1410.59.411.213.114.725.323.721.420.4   
157.311.613.311.014.322.625.820.321.8   
1610.612.114.911.212.821.627.118.220.1   
177.411.714.112.315.422.228.019.619.7   
1810.711.015.115.115.219.226.618.621.3   
1911.610.911.512.815.915.627.721.2    
2011.411.911.116.013.819.929.419.6    
218.011.312.116.612.214.228.921.8    
229.513.013.312.813.917.926.420.8    
235.911.411.216.112.421.024.919.6    
246.212.314.115.612.821.521.623.0    
256.612.414.615.513.017.922.121.9    
269.311.611.614.817.217.725.122.6    
2710.612.412.016.116.820.421.119.3    
2814.213.211.912.117.321.720.720.9    
2911.313.211.920.719.220.821.3    
3010.618.611.918.923.618.920.3    
314.316.421.519.719.4  
Avg: 7.69.311.813.014.620.322.720.3* 21.2   
Hi: 14.213.218.616.721.525.329.423.0* 27.5   
Lo: 1.50.87.38.211.914.216.618.2* 18.1   
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20217.69.311.813.014.620.322.720.3* 21.2   
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
Avg8.8* 9.2* 11.314.016.919.821.620.8* 19.2* 15.411.89.5