Year	scale 1-100
1970	53.75
1971	53.75
1972	53.75
1973	53.75
1974	53.75
1975	53.75
1976	53.75
1977	53.75
1978	53.75
1979	53.75
1980	53.75
1981	53.75
1982	53.75
1983	53.75
1984	53.75
1985	53.75
1986	53.75
1987	53.75
1988	53.75
1989	53.75
1990	53.75
1991	53.75
1992	53.75
1993	53.75
1994	53.75
1995	64.375
1996	64.375
1997	64.375
1998	64.375
1999	64.375
2000	64.375
2001	64.375
2002	64.375
2003	64.375
2004	64.375
2005	64.375
2006	64.375
2007	67.5
2008	70
2009	70
2010	70
2011	70
2012	70
2013	79.375
2014	76.25
2015	76.25
2016	81.875
2017	81.875
2018	81.875
2019	81.875
2020	85
2021	88.125
2022	88.125
2023	88.125