Schedule 1
| Tax Year | Percentage |
|---|---|
| 1978-79 | 572.4 |
| 1979-80 | 493.5 |
| 1980-81 | 395.8 |
| 1981-82 | 315.3 |
| 1982-83 | 277.2 |
| 1983-84 | 250.2 |
| 1984-85 | 224.3 |
| 1985-86 | 204.2 |
| 1986-87 | 179.3 |
| 1987-88 | 160.1 |
| 1988-89 | 139.3 |
| 1989-90 | 115.9 |
| 1990-91 | 101.2 |
| 1991-92 | 82.8 |
| 1992-93 | 71.6 |
| 1993-94 | 63.5 |
| 1994-95 | 58.5 |
| 1995-96 | 51.9 |
| 1996-97 | 47.7 |
| 1997-98 | 40.7 |
| 1998-99 | 34.5 |
| 1999-2000 | 29.1 |
| 2000-2001 | 21.4 |
| 2001-2002 | 16.8 |
| 2002-2003 | 11.9 |
| 2003-2004 | 8.1 |
| 2004-2005 | 4.1 |