Rate Period
7.25% 1 July 1973 to 31 March 1975
9.04% 1 April 1975 to 30 April 1976
9.19% 1 May 1976 to 30 April 1977
9.62% 1 May 1977 to 30 April 1978
8.88% 1 May 1978 to 30 April 1979
9.47% 1 May 1979 to 30 April 1980
11.38% 1 May 1980 to 30 June 1981
10.61% 1 July 1981 to 30 April 1982
12.60% 1 May 1982 to 30 April 1983
11.02% 1 May 1983 to 30 April 1984
10.97% 1 May 1984 to 30 April 1985
10.81% 1 May 1985 to 30 April 1986
12.74% 1 May 1986 to 30 April 1987
12.78% 1 May 1987 to 30 April 1988
12.35% 1 May 1988 to 30 April 1989
9.33% 1 May 1989 to 31 July 1990
12.01% 1 August 1990 to 31 July 1991
7.92% 1 August 1991 to 31 July 1992
9.48% 1 August 1992 to 31 July 1993
7.22% 1 August 1993 to 31 July 1994
9.75% 1 August 1994 to 31 July 1995
7.05% 1 August 1995 to 31 July 1996
8.60% 1 August 1996 to 31 July 1997
12.15% 1 August 1997 to 31 July 1998
14.92% 1 August 1998 to 31 July 1999
14.30% 1 August 1999 to 31 July 2000
12.54% 1 August 2000 to 31 July 2001
21.00% 1 August 2001 to 31 July 2002
4.45% 1 August 2002 to 31 July 2003
-2.57% 1 August 2003 to 31 July 2004
-0.19% 1 August 2004 to 31 May 2005
5.20% 1 June 2005 to 31 May 2006
13.20% 1 June 2006 to 31 May 2007
12.95% 1 June 2007 to 31 May 2008
10.72% 1 June 2008 to 31 May 2009
-3.94% 1 June 2009 to 31 May 2010
-4.78% 1 June 2010 to 31 May 2011
-2.33% 1 June 2011 to 31 May 2012
9.09% 1 June 2012 to 31 May 2013
8.58% 1 June 2013 to 31 May 2014
8.71% 1 June 2014 to 31 May 2015
11.64% 1 June 2015 to 31 May 2016
11.42% 1 June 2016 to 31 May 2017
9.36% 1 June 2017 to 31 May 2018
8.38% 1 June 2018 to 31 May 2019
6.72% 1 June 2019 to 31 May 2020
7.73% 1 June 2020 to 31 May 2021
7.71% 1 June 2021 to 31 May 2022
10.63% 1 June 2022 to 31 May 2023
4.15% 1 June 2023 to 31 May 2024
3.28% 1 June 2024 to 31 May 2025