| Year | Protected | Not Protected | Protected % |
| 2008 | 8 | 23 | 25.81 |
| 2009 | 26 | 6 | 81.25 |
| 2010 | 17 | 15 | 53.13 |
| 2011 | 28 | 4 | 87.50 |
| 2012 | 1 | 32 | 3.03 |
| 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 |
| Totals | 81 | 365 | 18.16 |