| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 32 | 2 | 94.12 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 22 | 12 | 64.71 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 18 | 16 | 52.94 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 31 | 2 | 93.94 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 103 | 371 | 21.73 |