Year	scale 1-100
1970	45.625
1971	45.625
1972	45.625
1973	48.125
1974	53.75
1975	53.75
1976	53.75
1977	53.75
1978	53.75
1979	53.75
1980	53.75
1981	56.25
1982	56.25
1983	56.25
1984	65.625
1985	65.625
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	65.625
1996	65.625
1997	65.625
1998	65.625
1999	65.625
2000	75
2001	75
2002	77.5
2003	77.5
2004	77.5
2005	77.5
2006	77.5
2007	77.5
2008	77.5
2009	77.5
2010	77.5
2011	77.5
2012	77.5
2013	77.5
2014	77.5
2015	77.5
2016	77.5
2017	77.5
2018	77.5
2019	80.625
2020	80.625
2021	80.625
2022	80.625
2023	80.625