| Year | Protected | Not Protected | Protected % |
| 2015 | 1 | 33 | 2.94 |
| 2006 | 17 | 19 | 47.22 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 12 | 22 | 35.29 |
| 2007 | 8 | 25 | 24.24 |
| 2013 | 0 | 34 | 0.00 |
| 2008 | 20 | 14 | 58.82 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 1 | 33 | 2.94 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 12 | 21 | 36.36 |
| 2017 | 0 | 34 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| Totals | 71 | 416 | 14.58 |