Year	scale 1-100
1970	66.25
1971	66.25
1972	66.25
1973	66.25
1974	66.25
1975	66.25
1976	68.75
1977	75
1978	75
1979	75
1980	75
1981	75
1982	75
1983	75
1984	75
1985	75
1986	78.125
1987	80.625
1988	85.625
1989	85.625
1990	85.625
1991	85.625
1992	85.625
1993	85.625
1994	85.625
1995	85.625
1996	85.625
1997	85.625
1998	88.125
1999	88.125
2000	94.375
2001	94.375
2002	94.375
2003	94.375
2004	94.375
2005	94.375
2006	94.375
2007	94.375
2008	94.375
2009	94.375
2010	94.375
2011	94.375
2012	96.875
2013	96.875
2014	96.875
2015	96.875
2016	100
2017	100
2018	100
2019	100
2020	100
2021	100
2022	100
2023	100