Year	scale 1-100
1970	43.75
1971	43.75
1972	43.75
1973	43.75
1974	43.75
1975	43.75
1976	43.75
1977	43.75
1978	43.75
1979	43.75
1980	43.75
1981	43.75
1982	43.75
1983	59.375
1984	65
1985	70.625
1986	70.625
1987	70.625
1988	70.625
1989	70.625
1990	70.625
1991	70.625
1992	70.625
1993	70.625
1994	73.125
1995	73.125
1996	73.125
1997	73.125
1998	73.125
1999	73.125
2000	73.125
2001	73.125
2002	73.125
2003	73.125
2004	73.125
2005	73.125
2006	73.125
2007	81.875
2008	85
2009	85
2010	88.125
2011	97.5
2012	97.5
2013	97.5
2014	97.5
2015	97.5
2016	97.5
2017	97.5
2018	97.5
2019	97.5
2020	97.5
2021	100
2022	100
2023	100