Year	scale 1-100
1970	49.375
1971	49.375
1972	49.375
1973	49.375
1974	49.375
1975	49.375
1976	49.375
1977	49.375
1978	49.375
1979	49.375
1980	49.375
1981	49.375
1982	49.375
1983	49.375
1984	49.375
1985	49.375
1986	49.375
1987	49.375
1988	49.375
1989	49.375
1990	49.375
1991	49.375
1992	49.375
1993	57.5
1994	57.5
1995	57.5
1996	57.5
1997	60
1998	60
1999	65
2000	68.125
2001	68.125
2002	68.125
2003	71.25
2004	71.25
2005	71.25
2006	71.25
2007	71.25
2008	73.75
2009	73.75
2010	73.75
2011	73.75
2012	73.75
2013	73.75
2014	73.75
2015	73.75
2016	73.75
2017	73.75
2018	73.75
2019	73.75
2020	73.75
2021	73.75
2022	73.75
2023	73.75