Year	scale 1-100
1970	37.5
1971	37.5
1972	37.5
1973	37.5
1974	37.5
1975	37.5
1976	37.5
1977	37.5
1978	37.5
1979	55.625
1980	55.625
1981	55.625
1982	55.625
1983	55.625
1984	55.625
1985	55.625
1986	55.625
1987	55.625
1988	55.625
1989	55.625
1990	55.625
1991	55.625
1992	67.5
1993	67.5
1994	67.5
1995	67.5
1996	67.5
1997	73.125
1998	73.125
1999	73.125
2000	73.125
2001	73.125
2002	78.125
2003	78.125
2004	78.125
2005	78.125
2006	78.125
2007	78.125
2008	78.125
2009	78.125
2010	78.125
2011	78.125
2012	78.125
2013	78.125
2014	78.125
2015	83.75
2016	83.75
2017	86.25
2018	86.25
2019	86.25
2020	86.25
2021	86.25
2022	86.25
2023	86.25