| Year | Protected | Not Protected | Protected % |
| 2015 | 34 | 0 | 100.00 |
| 2014 | 19 | 15 | 55.88 |
| 2020 | 13 | 21 | 38.24 |
| 2013 | 3 | 31 | 8.82 |
| 2019 | 9 | 25 | 26.47 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 11 | 23 | 32.35 |
| 2021 | 3 | 31 | 8.82 |
| 2011 | 0 | 34 | 0.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 27 | 7 | 79.41 |
| 2010 | 0 | 33 | 0.00 |
| 2017 | 23 | 11 | 67.65 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 142 | 333 | 29.89 |