JanFebMarAprMayJunJulAugSepOctNovDec
19.217.112.911.818.022.120.720.919.016.022.7 
28.820.610.211.919.321.017.320.219.513.819.9 
37.920.511.010.518.920.318.320.819.812.512.5 
49.812.913.515.224.616.118.520.323.913.510.8 
56.59.813.618.719.316.920.221.121.514.512.3 
67.812.29.015.218.217.418.824.619.818.320.5 
79.315.210.615.618.715.119.125.418.917.319.5 
810.312.810.617.323.314.320.323.218.617.718.8 
913.415.211.219.519.115.121.424.019.817.017.7 
109.815.511.419.815.616.320.222.520.214.913.8 
118.012.512.316.814.114.620.823.720.913.816.0 
127.911.712.616.812.514.820.223.620.814.017.5 
1311.415.711.715.813.616.520.821.124.714.517.9 
1414.113.711.215.213.817.519.621.128.912.317.5 
1514.315.912.418.214.218.018.821.424.310.518.3 
1616.020.410.419.515.416.820.020.922.411.113.4 
1712.112.912.119.115.116.420.620.624.011.614.5 
1810.410.213.816.515.616.521.522.324.913.819.2 
198.39.916.414.316.816.822.528.721.320.713.3 
205.010.917.514.218.418.822.126.320.422.011.3 
214.711.016.413.219.119.221.522.218.922.58.2 
228.112.013.213.519.220.322.620.619.619.610.5 
239.411.312.715.016.321.923.220.920.316.210.4 
2413.39.813.616.416.422.421.220.718.516.413.4 
2512.911.111.716.117.520.521.522.713.915.814.6 
2611.69.511.615.917.518.422.023.214.711.416.6 
2714.212.39.414.919.121.122.723.514.014.515.8 
2812.614.710.713.723.921.022.118.615.815.512.5 
2912.814.49.415.822.519.221.416.515.015.3  
3016.45.315.921.819.827.616.416.214.9  
3117.46.122.724.717.820.1 
Avg: 10.813.511.815.718.118.221.021.820.015.5* 15.3 
Hi: 17.420.617.519.824.622.427.628.728.922.5* 22.7 
Lo: 4.79.55.310.512.514.317.316.413.910.5* 8.2 
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
202010.813.511.815.718.118.221.021.820.015.5* 15.3 
20197.512.412.312.913.918.221.021.319.417.411.411.6
201810.06.811.214.814.618.521.921.420.515.513.212.0
20176.911.412.713.217.219.720.220.817.616.911.38.9
201611.610.110.213.016.118.220.521.319.815.911.511.5
20159.07.610.314.916.018.921.320.917.516.414.414.8
201411.910.711.714.214.719.019.920.220.619.214.79.1
20139.58.211.812.912.616.021.920.419.618.613.811.0
2012  * 13.411.216.618.819.321.719.316.312.711.4
Avg9.610.1* 11.713.615.518.420.821.119.416.9* 13.211.3