| Year | Protected | Not Protected | Protected % |
| 2008 | 9 | 22 | 29.03 |
| 2009 | 2 | 30 | 6.25 |
| 2010 | 22 | 10 | 68.75 |
| 2011 | 25 | 7 | 78.13 |
| 2012 | 12 | 21 | 36.36 |
| 2013 | 31 | 2 | 93.94 |
| 2014 | 12 | 22 | 35.29 |
| 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 |
| Totals | 113 | 294 | 27.76 |