Year	scale 1-100
1970	58.75
1971	58.75
1972	58.75
1973	58.75
1974	58.75
1975	61.875
1976	61.875
1977	72.5
1978	72.5
1979	72.5
1980	72.5
1981	72.5
1982	72.5
1983	72.5
1984	72.5
1985	72.5
1986	72.5
1987	72.5
1988	78.75
1989	78.75
1990	81.25
1991	81.25
1992	81.25
1993	81.25
1994	81.25
1995	81.25
1996	81.25
1997	81.25
1998	81.25
1999	81.25
2000	81.25
2001	81.25
2002	81.25
2003	81.25
2004	81.25
2005	81.25
2006	81.25
2007	81.25
2008	81.25
2009	81.25
2010	81.25
2011	81.25
2012	81.25
2013	81.25
2014	81.25
2015	81.25
2016	81.25
2017	81.25
2018	81.25
2019	81.25
2020	83.75
2021	83.75
2022	83.75
2023	83.75