Year	scale 1-100
1970	20.625
1971	20.625
1972	20.625
1973	20.625
1974	41.25
1975	41.25
1976	41.25
1977	41.25
1978	47.5
1979	47.5
1980	47.5
1981	47.5
1982	47.5
1983	47.5
1984	47.5
1985	47.5
1986	47.5
1987	47.5
1988	47.5
1989	47.5
1990	47.5
1991	47.5
1992	47.5
1993	47.5
1994	47.5
1995	47.5
1996	47.5
1997	47.5
1998	50
1999	50
2000	50
2001	50
2002	50
2003	58.75
2004	61.875
2005	64.375
2006	64.375
2007	64.375
2008	64.375
2009	64.375
2010	64.375
2011	64.375
2012	64.375
2013	64.375
2014	64.375
2015	64.375
2016	64.375
2017	64.375
2018	64.375
2019	64.375
2020	64.375
2021	64.375
2022	70.625
2023	70.625