| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 6 | 25 | 19.35 |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 20 | 12 | 62.50 |
| 2010 | 18 | 14 | 56.25 |
| 2011 | 20 | 12 | 62.50 |
| 2012 | 9 | 24 | 27.27 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 1 | 33 | 2.94 |
| 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 | 74 | 444 | 14.29 |