| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 1 | 35 | 2.78 |
| 2014 | 0 | 34 | 0.00 |
| 2009 | 17 | 17 | 50.00 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 9 | 24 | 27.27 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 13 | 21 | 38.24 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 0 | 34 | 0.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 10 | 23 | 30.30 |
| 2017 | 0 | 34 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| Totals | 50 | 505 | 9.01 |