Year	scale 1-100
1970	44.375
1971	44.375
1972	44.375
1973	44.375
1974	44.375
1975	44.375
1976	44.375
1977	44.375
1978	44.375
1979	44.375
1980	44.375
1981	44.375
1982	44.375
1983	44.375
1984	44.375
1985	44.375
1986	44.375
1987	44.375
1988	44.375
1989	44.375
1990	44.375
1991	44.375
1992	44.375
1993	44.375
1994	44.375
1995	44.375
1996	44.375
1997	44.375
1998	44.375
1999	44.375
2000	50
2001	50
2002	50
2003	50
2004	50
2005	50
2006	50
2007	50
2008	50
2009	50
2010	50
2011	50
2012	50
2013	50
2014	50
2015	52.5
2016	52.5
2017	52.5
2018	52.5
2019	52.5
2020	52.5
2021	58.75
2022	58.75
2023	58.75