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	43.75
1984	43.75
1985	43.75
1986	43.75
1987	43.75
1988	43.75
1989	43.75
1990	50
1991	50
1992	50
1993	50
1994	50
1995	53.125
1996	53.125
1997	53.125
1998	53.125
1999	53.125
2000	53.125
2001	53.125
2002	53.125
2003	53.125
2004	53.125
2005	53.125
2006	59.375
2007	59.375
2008	59.375
2009	62.5
2010	62.5
2011	62.5
2012	62.5
2013	62.5
2014	62.5
2015	62.5
2016	62.5
2017	62.5
2018	65
2019	71.25
2020	71.25
2021	71.25
2022	71.25
2023	71.25