| Year | Protected | Not Protected | Protected % |
| 1998-99 | 0 | 8 | 0.00 |
| 1999-00 | 0 | 10 | 0.00 |
| 2000-01 | 1 | 11 | 8.33 |
| 2001-02 | 5 | 9 | 35.71 |
| 2002-03 | 10 | 5 | 66.67 |
| 2003-04 | 9 | 7 | 56.25 |
| 2004-05 | 10 | 7 | 58.82 |
| 2006-07 | 0 | 2 | 0.00 |
| 2007-08 | 2 | 0 | 100.00 |
| 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 |
| Totals | 37 | 73 | 33.64 |