Year	scale 1-100
1970	48.75
1971	51.25
1972	53.75
1973	53.75
1974	53.75
1975	65
1976	65
1977	65
1978	71.25
1979	71.25
1980	71.25
1981	71.25
1982	71.25
1983	71.25
1984	71.25
1985	71.25
1986	71.25
1987	71.25
1988	71.25
1989	71.25
1990	71.25
1991	71.25
1992	71.25
1993	71.25
1994	71.25
1995	71.25
1996	74.375
1997	74.375
1998	74.375
1999	74.375
2000	74.375
2001	80
2002	80
2003	80
2004	80
2005	83.125
2006	89.375
2007	89.375
2008	89.375
2009	89.375
2010	89.375
2011	89.375
2012	89.375
2013	91.875
2014	94.375
2015	94.375
2016	94.375
2017	94.375
2018	97.5
2019	97.5
2020	97.5
2021	97.5
2022	97.5
2023	97.5