Year	scale 1-100
1970	33.75
1971	33.75
1972	33.75
1973	36.25
1974	36.25
1975	36.25
1976	36.25
1977	36.25
1978	36.25
1979	36.25
1980	36.25
1981	36.25
1982	36.25
1983	36.25
1984	36.25
1985	36.25
1986	36.25
1987	36.25
1988	36.25
1989	39.375
1990	54.375
1991	54.375
1992	54.375
1993	54.375
1994	60.625
1995	60.625
1996	60.625
1997	60.625
1998	60.625
1999	60.625
2000	60.625
2001	60.625
2002	63.75
2003	63.75
2004	63.75
2005	66.875
2006	71.875
2007	71.875
2008	75
2009	75
2010	75
2011	75
2012	77.5
2013	77.5
2014	77.5
2015	77.5
2016	77.5
2017	77.5
2018	77.5
2019	77.5
2020	80
2021	80
2022	80
2023	80