| Year | Protected | Not Protected | Protected % |
| 1998-99 | 2 | 6 | 25.00 |
| 1999-00 | 3 | 7 | 30.00 |
| 2000-01 | 11 | 1 | 91.67 |
| 2001-02 | 14 | 0 | 100.00 |
| 2002-03 | 15 | 0 | 100.00 |
| 2003-04 | 16 | 0 | 100.00 |
| 2004-05 | 17 | 0 | 100.00 |
| 2006-07 | 2 | 0 | 100.00 |
| 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 |
| Totals | 82 | 24 | 77.36 |