| Year | Protected | Not Protected | Protected % |
| 2000-01 | 0 | 12 | 0.00 |
| 2001-02 | 8 | 6 | 57.14 |
| 2002-03 | 11 | 4 | 73.33 |
| 2003-04 | 15 | 1 | 93.75 |
| 2004-05 | 12 | 5 | 70.59 |
| 2006-07 | 0 | 2 | 0.00 |
| 2007-08 | 0 | 2 | 0.00 |
| 2010-11 | 0 | 2 | 0.00 |
| 2011-12 | 0 | 2 | 0.00 |
| 2012-13 | 0 | 2 | 0.00 |
| 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 | 46 | 48 | 48.94 |