| Year | Protected | Not Protected | Protected % |
| 2015 | 17 | 17 | 50.00 |
| 2014 | 3 | 31 | 8.82 |
| 2020 | 0 | 34 | 0.00 |
| 2013 | 0 | 34 | 0.00 |
| 2019 | 0 | 34 | 0.00 |
| 2012 | 14 | 20 | 41.18 |
| 2018 | 3 | 31 | 8.82 |
| 2021 | 0 | 34 | 0.00 |
| 2011 | 34 | 0 | 100.00 |
| 2016 | 9 | 25 | 26.47 |
| 2010 | 0 | 33 | 0.00 |
| 2017 | 24 | 10 | 70.59 |
| Totals | 104 | 303 | 25.55 |