| Year | Protected | Not Protected | Protected % |
| 2008 | 31 | 0 | 100.00 |
| 2009 | 30 | 2 | 93.75 |
| 2010 | 5 | 27 | 15.63 |
| 2011 | 3 | 29 | 9.38 |
| 2012 | 5 | 28 | 15.15 |
| 2013 | 0 | 33 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2015 | 5 | 29 | 14.71 |
| 2016 | 14 | 21 | 40.00 |
| 2017 | 1 | 35 | 2.78 |
| 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 | 94 | 423 | 18.18 |