| Year | Protected | Not Protected | Protected % |
| 2008 | 13 | 18 | 41.94 |
| 2009 | 1 | 31 | 3.13 |
| 2010 | 23 | 9 | 71.88 |
| 2011 | 32 | 0 | 100.00 |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 33 | 0 | 100.00 |
| 2014 | 31 | 3 | 91.18 |
| 2015 | 17 | 17 | 50.00 |
| 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 | 183 | 263 | 41.03 |