| Year | Protected | Not Protected | Protected % |
| 1999-00 | 0 | 10 | 0.00 |
| 2000-01 | 1 | 11 | 8.33 |
| 2001-02 | 8 | 6 | 57.14 |
| 2002-03 | 13 | 2 | 86.67 |
| 2003-04 | 13 | 3 | 81.25 |
| 2004-05 | 15 | 2 | 88.24 |
| 2006-07 | 1 | 1 | 50.00 |
| 2007-08 | 2 | 0 | 100.00 |
| 2010-11 | 1 | 1 | 50.00 |
| 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 | 54 | 44 | 55.10 |