Year | Cold Season (November-April) | Warm Season (May-October) |
2004 | 7.18 | 7.52 |
2005 | 6.14 | 6.89 |
2006 | 6.56 | 7.09 |
2007 | 6.59 | 6.26 |
2008 | 6.10 | 5.25 |
2009 | 5.34 | 6.46 |
2010 | 5.23 | 5.66 |
2011 | 5.07 | 5.06 |
2013 | 5.12 | 5.56 |
2014 | 4.29 | 5.95 |
Average | 5.76 | 6.17 |