Year	scale 1-100
1970	41.25
1971	41.25
1972	41.25
1973	41.25
1974	43.75
1975	43.75
1976	51.875
1977	51.875
1978	51.875
1979	68.125
1980	68.125
1981	68.125
1982	68.125
1983	68.125
1984	70.625
1985	70.625
1986	70.625
1987	70.625
1988	70.625
1989	70.625
1990	70.625
1991	73.125
1992	73.125
1993	76.25
1994	76.25
1995	76.25
1996	76.25
1997	78.75
1998	78.75
1999	78.75
2000	78.75
2001	78.75
2002	78.75
2003	81.875
2004	81.875
2005	85
2006	85
2007	85
2008	85
2009	91.25
2010	91.25
2011	91.25
2012	91.25
2013	91.25
2014	91.25
2015	94.375
2016	94.375
2017	94.375
2018	94.375
2019	94.375
2020	96.875
2021	96.875
2022	96.875
2023	96.875