Year	scale 1-100
1970	51.25
1971	51.25
1972	51.25
1973	51.25
1974	51.25
1975	51.25
1976	51.25
1977	51.25
1978	51.25
1979	51.25
1980	51.25
1981	51.25
1982	51.25
1983	51.25
1984	51.25
1985	51.25
1986	51.25
1987	51.25
1988	51.25
1989	51.25
1990	51.25
1991	51.25
1992	51.25
1993	51.25
1994	51.25
1995	51.25
1996	51.25
1997	51.25
1998	51.25
1999	57.5
2000	57.5
2001	57.5
2002	57.5
2003	57.5
2004	57.5
2005	57.5
2006	60
2007	60
2008	71.875
2009	71.875
2010	74.375
2011	74.375
2012	74.375
2013	74.375
2014	74.375
2015	74.375
2016	74.375
2017	74.375
2018	74.375
2019	79.375
2020	82.5
2021	82.5
2022	82.5
2023	82.5