Year	scale 1-100
1970	55.625
1971	55
1972	55
1973	58.125
1974	58.125
1975	58.125
1976	58.125
1977	58.125
1978	58.125
1979	58.125
1980	58.125
1981	58.125
1982	58.125
1983	58.125
1984	58.125
1985	58.125
1986	58.125
1987	58.125
1988	58.125
1989	58.125
1990	58.125
1991	58.125
1992	61.25
1993	61.25
1994	61.25
1995	61.25
1996	61.25
1997	61.25
1998	61.25
1999	61.25
2000	67.5
2001	67.5
2002	67.5
2003	67.5
2004	67.5
2005	67.5
2006	67.5
2007	67.5
2008	70
2009	70
2010	72.5
2011	72.5
2012	72.5
2013	72.5
2014	72.5
2015	72.5
2016	69.375
2017	69.375
2018	69.375
2019	69.375
2020	69.375
2021	69.375
2022	75.625
2023	75.625