| Year | Protected | Not Protected | Protected % |
| 2009 | 0 | 32 | 0.00 |
| 2010 | 1 | 31 | 3.13 |
| 2011 | 0 | 32 | 0.00 |
| 2012 | 0 | 33 | 0.00 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 2 | 32 | 5.88 |
| 2015 | 8 | 26 | 23.53 |
| 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 | 11 | 434 | 2.47 |