| Year | Protected | Not Protected | Protected % |
| 2015 | 5 | 29 | 14.71 |
| 2006 | 0 | 36 | 0.00 |
| 2014 | 17 | 17 | 50.00 |
| 2009 | 23 | 11 | 67.65 |
| 2020 | 0 | 34 | 0.00 |
| 2007 | 0 | 33 | 0.00 |
| 2013 | 32 | 2 | 94.12 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 33 | 1 | 97.06 |
| 2018 | 0 | 34 | 0.00 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 2 | 32 | 5.88 |
| 2022 | 0 | 34 | 0.00 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 14 | 19 | 42.42 |
| 2017 | 0 | 34 | 0.00 |
| 2005 | 0 | 45 | 0.00 |
| 2023 | 0 | 34 | 0.00 |
| Totals | 126 | 531 | 19.18 |