Schedule Percentage increase of earnings factor for specified tax years
Original text. Later amendments are not shown.
| Tax year | Percentage increase |
|---|
| 1978 - 1979 | 677.6 |
| 1979 - 1980 | 586.3 |
| 1980 - 1981 | 473.3 |
| 1981 - 1982 | 380.2 |
| 1982 - 1983 | 336.1 |
| 1983 - 1984 | 305.0 |
| 1984 - 1985 | 275.0 |
| 1985 - 1986 | 251.7 |
| 1986 - 1987 | 223.0 |
| 1987 - 1988 | 200.7 |
| 1988 - 1989 | 176.7 |
| 1989 - 1990 | 149.7 |
| 1990 - 1991 | 132.7 |
| 1991 - 1992 | 111.4 |
| 1992 - 1993 | 98.5 |
| 1993 - 1994 | 89.0 |
| 1994 - 1995 | 83.3 |
| 1995 - 1996 | 75.6 |
| 1996 - 1997 | 70.8 |
| 1997 - 1998 | 62.7 |
| 1998 - 1999 | 55.5 |
| 1999 - 2000 | 49.3 |
| 2000 - 2001 | 40.4 |
| 2001 - 2002 | 35.0 |
| 2002 - 2003 | 29.5 |
| 2003 - 2004 | 25.0 |
| 2004 - 2005 | 20.4 |
| 2005 - 2006 | 15.6 |
| 2006 - 2007 | 11.8 |
| 2007 - 2008 | 7.4 |
| 2008 - 2009 | 3.1 |