Year	scale 1-100
1970	55
1971	55
1972	55
1973	55
1974	63.125
1975	63.125
1976	63.125
1977	63.125
1978	63.125
1979	63.125
1980	63.125
1981	63.125
1982	63.125
1983	63.125
1984	63.125
1985	63.125
1986	65.625
1987	65.625
1988	65.625
1989	65.625
1990	65.625
1991	65.625
1992	65.625
1993	65.625
1994	65.625
1995	75
1996	77.5
1997	77.5
1998	77.5
1999	77.5
2000	77.5
2001	77.5
2002	77.5
2003	77.5
2004	77.5
2005	77.5
2006	77.5
2007	77.5
2008	80
2009	80
2010	80
2011	80
2012	80
2013	80
2014	80
2015	80
2016	80
2017	80
2018	80
2019	83.125
2020	86.25
2021	86.25
2022	91.875
2023	91.875