JanFebMarAprMayJunJulAugSepOctNovDec
123.431.332.826.226.322.320.521.932.125.930.728.5
224.234.433.730.624.222.416.922.233.824.828.032.6
332.133.730.633.024.120.718.723.225.324.028.932.1
432.931.333.429.923.122.820.623.123.225.830.931.3
531.632.829.026.126.323.421.422.724.828.832.131.7
627.634.830.831.227.123.721.322.925.632.430.232.6
729.831.831.430.624.919.821.822.727.732.931.632.4
830.930.829.731.824.921.921.220.627.932.330.535.8
931.728.230.629.425.223.422.422.528.824.831.532.5
1033.426.329.628.825.423.924.523.827.221.431.629.8
1130.630.827.829.425.423.323.923.326.725.930.726.3
1230.230.730.428.925.324.424.121.627.927.930.5 
1331.329.630.828.424.621.820.320.523.821.430.7 
1433.833.131.729.723.824.119.819.924.225.534.3 
1528.829.631.130.226.323.419.124.427.328.129.8 
1628.023.729.730.320.121.618.426.725.224.926.2 
1731.931.229.128.622.620.316.329.425.228.329.6 
1834.130.930.127.926.121.419.124.926.327.930.4 
1934.530.730.829.122.722.220.824.728.131.124.4 
2032.931.132.426.124.122.323.823.931.327.721.9 
2135.232.427.220.823.123.421.225.529.327.823.2 
2236.833.727.726.623.820.422.326.627.728.823.6 
2328.135.926.927.124.921.223.325.028.929.728.1 
2430.931.321.428.724.922.624.126.327.931.929.4 
2533.230.821.829.121.224.224.327.726.430.629.6 
2630.633.922.524.725.125.124.528.427.427.629.9 
2735.931.823.825.925.925.123.528.722.827.830.8 
2830.232.630.027.124.124.422.629.221.326.131.7 
2931.832.831.027.424.823.120.529.927.230.529.9 
3029.529.827.722.927.820.729.929.328.127.3 
3131.428.826.421.832.430.5 
Avg: 31.231.429.228.424.522.921.425.027.027.829.3* 31.4
Hi: 36.835.933.733.027.127.824.532.433.832.934.3* 35.8
Lo: 23.423.721.420.820.119.816.319.921.321.421.9* 26.3
Note:  *Incomplete dataset.
AvgJanFebMarAprMayJunJulAugSepOctNovDec
202431.231.429.228.424.522.921.425.027.027.829.3* 31.4
202331.532.131.927.824.523.923.125.226.828.328.532.5
202230.029.529.727.423.821.620.022.724.726.429.028.9
202130.630.628.826.624.221.721.724.125.328.526.130.1
202031.830.829.729.224.322.822.323.826.328.329.830.7
201932.331.331.326.924.922.523.323.827.227.131.032.5
201832.330.129.127.924.822.323.124.324.826.330.030.2
201731.932.830.926.424.722.722.924.727.727.027.431.5
201629.530.829.127.526.221.322.423.125.427.430.630.5
201530.028.529.525.623.920.820.222.823.826.628.928.8
201429.629.228.127.524.022.321.421.524.226.728.629.7
201330.127.827.726.022.520.421.024.126.627.927.929.0
201228.229.327.525.623.120.220.422.525.126.327.629.8
2011  * 28.125.322.520.220.721.724.425.128.726.9
Avg30.730.3* 29.327.024.121.821.723.525.727.128.8* 30.2