JanFebMarAprMayJunJulAugSepOctNovDec
17.66.6-1.25.315.023.729.124.024.6   
29.17.10.83.412.620.827.228.525.8   
38.33.60.314.216.026.824.825.722.6   
49.85.62.612.319.417.528.125.816.6   
55.23.99.212.924.221.129.628.719.8   
65.32.17.914.525.417.229.827.116.2   
75.24.99.213.027.422.929.628.216.6   
83.17.87.512.424.716.329.621.816.5   
94.16.810.212.718.223.1 20.418.6   
105.58.712.87.517.323.9 18.217.9   
117.86.112.27.616.925.2 22.118.1   
126.25.36.65.817.120.1 19.718.2   
135.94.610.610.121.022.5 25.118.3   
144.06.012.116.124.121.2 22.315.9   
159.37.88.113.025.918.8 24.817.8   
163.67.810.614.313.819.8 20.221.7   
174.78.91.614.415.918.0 18.123.3   
187.47.60.322.719.722.8 25.721.9   
195.310.86.227.522.522.1 21.720.1   
203.311.17.822.224.421.718.823.2    
216.67.49.221.825.121.423.924.3    
228.23.910.618.921.426.327.724.4    
2312.63.410.915.421.323.330.818.1    
2412.87.110.812.222.828.926.915.8    
258.95.613.713.013.331.127.119.9    
268.22.313.314.221.930.632.715.7    
2712.01.411.48.126.6 29.718.1    
2813.6-2.18.89.225.022.821.718.1    
2910.88.212.222.428.320.920.1    
306.910.111.114.526.024.720.1    
316.94.421.223.221.2  
Avg: 7.45.88.013.320.5* 22.9* 26.822.2* 19.5   
Hi: 13.611.113.727.527.4* 31.1* 32.728.7* 25.8   
Lo: 3.1-2.1-1.23.412.6* 16.3* 18.815.7* 15.9   
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
20187.45.88.013.320.5* 22.9* 26.822.2* 19.5   
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