Year	scale 1-100
1970	47.5
1971	47.5
1972	47.5
1973	47.5
1974	47.5
1975	47.5
1976	47.5
1977	47.5
1978	47.5
1979	47.5
1980	47.5
1981	47.5
1982	47.5
1983	47.5
1984	47.5
1985	47.5
1986	47.5
1987	47.5
1988	47.5
1989	47.5
1990	47.5
1991	47.5
1992	47.5
1993	47.5
1994	58.75
1995	65
1996	68.125
1997	68.125
1998	68.125
1999	68.125
2000	68.125
2001	68.125
2002	70.625
2003	70.625
2004	70.625
2005	73.75
2006	73.75
2007	73.75
2008	73.75
2009	73.75
2010	73.75
2011	73.75
2012	73.75
2013	73.75
2014	76.875
2015	76.875
2016	76.875
2017	79.375
2018	79.375
2019	79.375
2020	79.375
2021	79.375
2022	79.375
2023	79.375