Schedule
| Tax Year | Percentage Increase |
|---|---|
| 1978-79 | 453·8 |
| 1979-80 | 388·7 |
| 1980-81 | 308·3 |
| 1981-82 | 242·0 |
| 1982-83 | 210·6 |
| 1983-84 | 188·4 |
| 1984-85 | 167·0 |
| 1985-86 | 150·5 |
| 1986-87 | 130·0 |
| 1987-88 | 114·2 |
| 1988-89 | 97·0 |
| 1989-90 | 77·8 |
| 1990-91 | 65·7 |
| 1991-92 | 50·5 |
| 1992-93 | 41·3 |
| 1993-94 | 34·6 |
| 1994-95 | 30·6 |
| 1995-96 | 25·1 |
| 1996-97 | 21·7 |
| 1997-98 | 15·9 |
| 1998-99 | 10·8 |
| 1999-2000 | 6·3 |