| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 3 | 31 | 8.82 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 3 | 31 | 8.82 |
| 2012 | 17 | 17 | 50.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 4 | 30 | 11.76 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 27 | 6 | 81.82 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 54 | 387 | 12.24 |