| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 0 | 36 | 0.00 |
| 2014 | 3 | 31 | 8.82 |
| 2009 | 18 | 16 | 52.94 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 32 | 1 | 96.97 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 30 | 4 | 88.24 |
| 2012 | 0 | 34 | 0.00 |
| 2018 | 0 | 34 | 0.00 |
| 2011 | 5 | 29 | 14.71 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 17 | 16 | 51.52 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 105 | 405 | 20.59 |