Year	scale 1-100
1970	38.75
1971	38.75
1972	38.75
1973	38.75
1974	38.75
1975	38.75
1976	38.75
1977	38.75
1978	38.75
1979	38.75
1980	38.75
1981	38.75
1982	38.75
1983	38.75
1984	41.875
1985	41.875
1986	41.875
1987	41.875
1988	41.875
1989	41.875
1990	41.875
1991	41.875
1992	41.875
1993	41.875
1994	41.875
1995	41.875
1996	41.875
1997	41.875
1998	41.875
1999	41.875
2000	44.375
2001	46.875
2002	46.875
2003	46.875
2004	46.875
2005	46.875
2006	46.875
2007	46.875
2008	46.875
2009	46.875
2010	53.125
2011	53.125
2012	53.125
2013	53.125
2014	53.125
2015	53.125
2016	53.125
2017	53.125
2018	53.125
2019	53.125
2020	53.125
2021	53.125
2022	53.125
2023	53.125