| Year | Protected | Not Protected | Protected % |
| 2006 | 0 | 41 | 0.00 |
| 2007 | 4 | 27 | 12.90 |
| 2008 | 26 | 5 | 83.87 |
| 2009 | 24 | 8 | 75.00 |
| 2010 | 3 | 29 | 9.38 |
| 2011 | 28 | 4 | 87.50 |
| 2012 | 14 | 19 | 42.42 |
| 2013 | 1 | 32 | 3.03 |
| 2014 | 0 | 34 | 0.00 |
| 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 |
| 2021 | 0 | 30 | 0.00 |
| Totals | 100 | 448 | 18.25 |