| Year | Protected | Not Protected | Protected % |
| 1999-00 | 0 | 10 | 0.00 |
| 2000-01 | 0 | 12 | 0.00 |
| 2001-02 | 5 | 9 | 35.71 |
| 2002-03 | 7 | 8 | 46.67 |
| 2003-04 | 11 | 5 | 68.75 |
| 2004-05 | 7 | 10 | 41.18 |
| 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 |
| 2019-20 | 0 | 2 | 0.00 |
| 2020-21 | 0 | 3 | 0.00 |
| Totals | 30 | 79 | 27.52 |