| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 0 | 36 | 0.00 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 20 | 14 | 58.82 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 16 | 17 | 48.48 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 26 | 8 | 76.47 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 21 | 12 | 63.64 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 83 | 427 | 16.27 |