| Year | Protected | Not Protected | Protected % |
| 2015 | 0 | 34 | 0.00 |
| 2006 | 2 | 34 | 5.56 |
| 2004 | 0 | 44 | 0.00 |
| 2014 | 1 | 33 | 2.94 |
| 2009 | 32 | 2 | 94.12 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 12 | 21 | 36.36 |
| 2013 | 16 | 18 | 47.06 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 24 | 10 | 70.59 |
| 2012 | 27 | 7 | 79.41 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 33 | 0 | 100.00 |
| 2017 | 0 | 34 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 181 | 520 | 25.82 |