Schedule Percentage increase of earnings factor for specified tax years
Original text. Later amendments are not shown.
| Tax year | Percentage increase |
|---|
| 1978-1979 | 820.9 |
| 1979-1980 | 712.8 |
| 1980-1981 | 579.1 |
| 1981-1982 | 468.7 |
| 1982-1983 | 416.6 |
| 1983-1984 | 379.6 |
| 1984-1985 | 344.1 |
| 1985-1986 | 316.6 |
| 1986-1987 | 282.6 |
| 1987-1988 | 256.2 |
| 1988-1989 | 227.7 |
| 1989-1990 | 195.7 |
| 1990-1991 | 175.6 |
| 1991-1992 | 150.3 |
| 1992-1993 | 135.1 |
| 1993-1994 | 123.9 |
| 1994-1995 | 117.1 |
| 1995-1996 | 108.0 |
| 1996-1997 | 102.3 |
| 1997-1998 | 92.7 |
| 1998-1999 | 84.2 |
| 1999-2000 | 76.8 |
| 2000-2001 | 66.3 |
| 2001-2002 | 59.9 |
| 2002-2003 | 53.3 |
| 2003-2004 | 48.0 |
| 2004-2005 | 42.6 |
| 2005-2006 | 37.0 |
| 2006-2007 | 32.5 |
| 2007-2008 | 27.2 |
| 2008-2009 | 22.1 |
| 2009-2010 | 18.4 |
| 2010-2011 | 17.0 |
| 2011-2012 | 14.4 |
| 2012-2013 | 12.4 |
| 2013-2014 | 10.4 |
| 2014-2015 | 9.4 |
| 2015-2016 | 7.8 |
| 2016-2017 | 5.7 |
| 2017-2018 | 3.0 |