| Month / Year | 2007 / 2008 | 2008 / 2009 | 2009 / 2010 | 2010 / 2011 | 2011 / 2012 | 2012 / 2013 |
|---|---|---|---|---|---|---|
| Sep | 33.0 | 74.0 | 30.0 | 93.5 | 33.0 | 41.2 |
| Oct | 38.0 | 46.0 | 86.0 | 60.6 | 68.0 | 59.4 |
| Nov | 55.0 | 68.5 | 52.5 | 69.5 | 17.9 | 115.9 |
| Dec | 47.0 | 63.5 | 81.5 | 66.0 | 47.1 | 105.1 |
| Jan | 120.5 | 42.0 | 63.5 | 33.5 | 30.2 | 61.7 |
| Feb | 17.0 | 53.5 | 63.0 | 67.5 | 20.2 | 34.3 |
| Mar | 64.0 | 21.5 | 38.5 | 4.5 | 23.1 | 44.7 |
| Apr | 73.0 | 13.5 | 19.5 | 2.5 | 150.9 | 8.4 |
| May | 13.5 | 32.0 | 8.0 | 31.0 | 48.9 | 6.0 |
| Jun | 63.5 | 14.0 | 41.0 | 42.5 | 102.0 | 0.0 |
| Jul | 67.0 | 103.0 | 17.5 | 45.5 | 77.7 | 0.0 |
| Aug | 118.0 | 38.0 | 51.0 | 71.0 | 49.1 | 0.0 |