| 6 April 1990 | 3% | 1990/255 |
| 6 April 1991 | 3% | 1991/427 |
| 6 April 1992 | 3% | 1991/2888 |
| 6 April 1993 | 3% | 1993/279 |
| 6 April 1994 | 1.8% | 1994/500 |
| 6 April 1995 | 2.2% | 1995/515 |
| 6 April 1996 | 3% | 1996/485 |
| 6 April 1997 | 2.1% | 1997/457 |
| 6 April 1998 | 3% | 1998/406 |
| 6 April 1999 | 3% | 1999/192 |
| 6 April 2000 | 1.1% | 2000/425 |
| 6 April 2001 | 3% | 2001/160 |
| 6 April 2002 | 1.7% | 2002/649 |
| 6 April 2003 | 1.7% | 2003/524 |
| 6 April 2004 | 2.8% | 2004/537 |
| 6 April 2005 | 3.0% | 2005/521 |
| 6 April 2006 | 2.7% | 2006/673 |
| 6 April 2007 | 3% | 2007/686 |
| 6 April 2008 | 3% | 2008/581 |
| Made under PSA 1993 s.109. | ||