| Year | Protected | Not Protected | Protected % |
| 2002-03 | 0 | 15 | 0.00 |
| 2003-04 | 12 | 4 | 75.00 |
| 2004-05 | 17 | 0 | 100.00 |
| 2006-07 | 1 | 1 | 50.00 |
| 2007-08 | 2 | 0 | 100.00 |
| 2010-11 | 2 | 0 | 100.00 |
| 2011-12 | 2 | 0 | 100.00 |
| 2012-13 | 2 | 0 | 100.00 |
| 2013-14 | 0 | 2 | 0.00 |
| 2014-15 | 0 | 2 | 0.00 |
| 2015-16 | 0 | 2 | 0.00 |
| 2016-17 | 0 | 2 | 0.00 |
| 2017-18 | 0 | 2 | 0.00 |
| Totals | 38 | 30 | 55.88 |