JanFebMarAprMayJunJulAugSepOctNovDec
19.91.89.412.916.823.319.6     
25.33.613.710.615.822.318.9     
33.25.910.99.98.419.222.3     
45.49.310.28.712.317.723.5     
57.07.512.212.712.215.323.7     
611.28.711.912.512.118.820.9     
711.77.17.913.013.216.321.6     
88.111.78.413.78.113.319.7     
94.89.28.211.88.118.818.9     
109.77.37.011.411.215.323.0     
118.78.49.712.313.910.625.1     
1210.711.38.88.717.413.323.4     
1311.211.79.710.019.913.521.3     
148.314.611.17.920.815.620.9     
1510.214.611.513.720.117.324.2     
169.613.811.713.717.619.125.7     
174.313.58.918.718.920.123.4     
183.910.19.519.314.520.121.7     
192.89.013.222.216.920.318.2     
205.911.619.823.319.718.4      
215.516.615.123.319.419.4      
224.016.413.922.619.622.3      
233.415.211.618.621.220.2      
245.715.611.418.320.220.5      
2511.117.713.315.121.418.1      
269.719.212.813.518.314.9      
276.317.412.810.517.621.7      
284.49.915.814.616.622.3      
293.318.914.715.930.1      
303.314.717.921.822.8      
31-1.411.421.3    
Avg: 6.711.411.814.516.518.7* 21.9     
Hi: 11.719.219.823.321.830.1* 25.7     
Lo: -1.41.87.07.98.110.6* 18.2     
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20196.711.411.814.516.518.7* 21.9     
20187.45.88.013.320.5* 22.9* 26.822.218.414.810.39.0
2017* 7.5 * 13.2* 14.718.620.922.120.717.815.810.1* 7.6
2016   * 13.3* 17.6* 20.1* 22.5* 22.520.8* 14.6* 9.4* 9.4
2015* 8.4* 7.910.7* 15.8* 15.8* 20.421.421.418.1* 17.0 * 13.1
20148.1* 9.412.9* 15.5* 16.320.524.520.419.9* 15.5* 11.88.4
2013* 8.0* 7.3* 7.2* 12.8* 15.8* 19.9* 25.122.218.6* 16.0* 9.9* 9.6
2012* 8.48.4* 20.111.8* 14.3* 17.7* 19.9* 21.3* 18.6* 13.1* 8.8* 7.5
20117.3* 10.1* 12.2* 18.4* 17.420.321.9* 21.3* 20.4* 16.6* 12.3* 8.4
2010* 4.5* 6.613.3* 15.7* 16.3* 21.521.820.5* 18.914.68.2* 3.3
2009* 6.37.7* 12.7* 16.4* 18.1* 21.3* 22.222.9* 20.5* 16.6* 11.3* 6.0
2008* 9.3* 10.1* 11.215.1* 21.3* 21.0* 24.3* 23.4* 20.2* 12.3* 9.9* 6.5
2007    * 17.6* 17.4* 20.2* 21.2* 17.3* 15.511.2* 7.4
Avg