| Year | Protected | Not Protected | Protected % |
| 2009 | 3 | 29 | 9.38 |
| 2010 | 2 | 30 | 6.25 |
| 2011 | 28 | 4 | 87.50 |
| 2012 | 8 | 25 | 24.24 |
| 2013 | 1 | 32 | 3.03 |
| 2014 | 1 | 33 | 2.94 |
| 2015 | 0 | 34 | 0.00 |
| 2016 | 0 | 35 | 0.00 |
| 2017 | 0 | 36 | 0.00 |
| 2018 | 0 | 37 | 0.00 |
| 2019 | 0 | 38 | 0.00 |
| 2020 | 0 | 39 | 0.00 |
| 2021 | 0 | 30 | 0.00 |
| Totals | 43 | 402 | 9.66 |