Year	scale 1-100
1970	48.75
1971	48.75
1972	51.875
1973	51.875
1974	51.875
1975	51.875
1976	51.875
1977	51.875
1978	51.875
1979	51.875
1980	51.875
1981	51.875
1982	51.875
1983	51.875
1984	51.875
1985	51.875
1986	51.875
1987	51.875
1988	51.875
1989	51.875
1990	51.875
1991	51.875
1992	51.875
1993	51.875
1994	51.875
1995	51.875
1996	51.875
1997	60.625
1998	60.625
1999	60.625
2000	63.75
2001	63.75
2002	63.75
2003	63.75
2004	63.75
2005	63.75
2006	63.75
2007	63.75
2008	66.875
2009	66.875
2010	66.875
2011	66.875
2012	66.875
2013	75
2014	75
2015	75
2016	75
2017	75
2018	75
2019	75
2020	75
2021	75
2022	75
2023	75