Year	scale 1-100
1970	57.5
1971	57.5
1972	57.5
1973	57.5
1974	57.5
1975	57.5
1976	57.5
1977	57.5
1978	57.5
1979	57.5
1980	57.5
1981	60.625
1982	60.625
1983	60.625
1984	60.625
1985	60.625
1986	77.5
1987	77.5
1988	77.5
1989	77.5
1990	77.5
1991	77.5
1992	77.5
1993	77.5
1994	77.5
1995	77.5
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	80
2020	80
2021	80
2022	85
2023	85