Year	scale 1-100
1970	39.375
1971	39.375
1972	39.375
1973	39.375
1974	39.375
1975	39.375
1976	39.375
1977	39.375
1978	48.75
1979	48.75
1980	48.75
1981	48.75
1982	48.75
1983	48.75
1984	48.75
1985	48.75
1986	48.75
1987	48.75
1988	48.75
1989	48.75
1990	48.75
1991	48.75
1992	48.75
1993	48.75
1994	48.75
1995	48.75
1996	48.75
1997	57.5
1998	57.5
1999	57.5
2000	57.5
2001	57.5
2002	57.5
2003	57.5
2004	57.5
2005	57.5
2006	57.5
2007	57.5
2008	57.5
2009	57.5
2010	57.5
2011	57.5
2012	57.5
2013	57.5
2014	57.5
2015	57.5
2016	57.5
2017	66.25
2018	66.25
2019	66.25
2020	66.25
2021	66.25
2022	66.25
2023	66.25