| Year | Protected | Not Protected | Protected % |
| 2010 | 1 | 31 | 3.13 |
| 2011 | 18 | 14 | 56.25 |
| 2012 | 29 | 4 | 87.88 |
| 2013 | 5 | 28 | 15.15 |
| 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 |
| 2021 | 0 | 30 | 0.00 |
| 2022 | 0 | 41 | 0.00 |
| Totals | 53 | 401 | 11.67 |