| Year | Protected | Not Protected | Protected % |
| 2005 | 0 | 41 | 0.00 |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 0 | 31 | 0.00 |
| 2008 | 24 | 7 | 77.42 |
| 2009 | 22 | 10 | 68.75 |
| 2010 | 1 | 31 | 3.13 |
| 2011 | 2 | 30 | 6.25 |
| 2012 | 27 | 6 | 81.82 |
| 2013 | 4 | 29 | 12.12 |
| 2014 | 3 | 31 | 8.82 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| Totals | 83 | 476 | 14.85 |