| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 13 | 21 | 38.24 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 7 | 27 | 20.59 |
| 2012 | 17 | 17 | 50.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 12 | 22 | 35.29 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 28 | 5 | 84.85 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 77 | 364 | 17.46 |