| Year | Protected | Not Protected | Protected % |
| 2008 | 0 | 31 | 0.00 |
| 2009 | 14 | 18 | 43.75 |
| 2010 | 18 | 14 | 56.25 |
| 2011 | 16 | 16 | 50.00 |
| 2012 | 33 | 0 | 100.00 |
| 2013 | 8 | 25 | 24.24 |
| 2014 | 22 | 12 | 64.71 |
| 2015 | 3 | 31 | 8.82 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 9 | 27 | 25.00 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| Totals | 123 | 323 | 27.58 |