| Year | Protected | Not Protected | Protected % |
| 2008 | 16 | 15 | 51.61 |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 19 | 13 | 59.38 |
| 2011 | 31 | 1 | 96.88 |
| 2012 | 13 | 20 | 39.39 |
| 2013 | 1 | 32 | 3.03 |
| 2014 | 18 | 16 | 52.94 |
| 2015 | 1 | 33 | 2.94 |
| 2016 | 4 | 31 | 11.43 |
| 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 |
| 2022 | 0 | 41 | 0.00 |
| Totals | 103 | 414 | 19.92 |