| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 1 | 33 | 2.94 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 4 | 30 | 11.76 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 6 | 28 | 17.65 |
| 2012 | 5 | 29 | 14.71 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 26 | 8 | 76.47 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 33 | 0 | 100.00 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 75 | 399 | 15.82 |