| 2003 | 255 | 1 | 1 - 4.6 | 4.6 |
| 2004 | 553 | 0.8 | 0.8 - 4.6 | 4.6 |
| 2005 | 386 | 0.7 | 0.7 - 4.3 | 4.3 |
| 2006 | 124 | 0.4 | 0.4 - 4.7 | 4.7 |
| 2007 | 616 | 0 | 0 - 4.5 | 4.5 |
| 2008 | 1037 | 0 | 0 - 4.2 | 4.2 |
| 2009 | 52 | 2.1 | 2.1 - 4.7 | 4.7 |
| 2010 | 66 | 0.1 | 0.1 - 4.4 | 4.4 |
| 2011 | 681 | 0.2 | 0.2 - 4.5 | 4.5 |
| 2012 | 117 | 1.3 | 1.3 - 4.5 | 4.5 |
| 2013 | 79 | 2.3 | 2.3 - 5.4 | 5.4 |
| 2014 | 25 | 3.1 | 3.1 - 4.1 | 4.1 |
| 2015 | 13 | 3.5 | 3.5 - 4.1 | 4.1 |