JanFebMarAprMayJunJulAugSepOctNovDec
19.91.89.412.916.8       
25.33.613.710.615.8       
33.25.910.99.98.4       
45.49.310.28.712.3       
57.07.512.212.712.2       
611.28.711.912.512.1       
711.77.17.913.013.2       
88.111.78.413.78.1       
94.89.28.211.88.1       
109.77.37.011.411.2       
118.78.49.712.313.9       
1210.711.38.88.717.4       
1311.211.79.710.019.9       
148.314.611.17.920.8       
1510.214.611.513.720.1       
169.613.811.713.717.6       
174.313.58.918.718.9       
183.910.19.519.314.5       
192.89.013.222.216.9       
205.911.619.823.319.7       
215.516.615.123.3        
224.016.413.922.6        
233.415.211.618.6        
245.715.611.418.3        
2511.117.713.315.1        
269.719.212.813.5        
276.317.412.810.5        
284.49.915.814.6        
293.318.914.7        
303.314.717.9        
31-1.411.4     
Avg: 6.711.411.814.5* 14.9       
Hi: 11.719.219.823.3* 20.8       
Lo: -1.41.87.07.9* 8.1       
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20196.711.411.814.5* 14.9       
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