| Year | Protected | Not Protected | Protected % |
| 2015 | 7 | 27 | 20.59 |
| 2014 | 34 | 0 | 100.00 |
| 2009 | 0 | 34 | 0.00 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 30 | 4 | 88.24 |
| 2019 | 0 | 34 | 0.00 |
| 2008 | 0 | 34 | 0.00 |
| 2012 | 21 | 13 | 61.76 |
| 2018 | 4 | 30 | 11.76 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 25 | 9 | 73.53 |
| 2016 | 0 | 34 | 0.00 |
| 2010 | 24 | 9 | 72.73 |
| 2017 | 0 | 34 | 0.00 |
| Totals | 145 | 330 | 30.53 |