Year	scale 1-100
1970	48.75
1971	48.75
1972	48.75
1973	48.75
1974	48.75
1975	48.75
1976	48.75
1977	48.75
1978	48.75
1979	48.75
1980	51.25
1981	51.25
1982	51.25
1983	51.25
1984	51.25
1985	51.25
1986	51.25
1987	51.25
1988	51.25
1989	56.875
1990	56.875
1991	56.875
1992	56.875
1993	56.875
1994	56.875
1995	56.875
1996	59.375
1997	59.375
1998	59.375
1999	59.375
2000	59.375
2001	59.375
2002	59.375
2003	59.375
2004	59.375
2005	59.375
2006	61.875
2007	61.875
2008	61.875
2009	61.875
2010	61.875
2011	61.875
2012	61.875
2013	61.875
2014	61.875
2015	68.125
2016	68.125
2017	68.125
2018	68.125
2019	68.125
2020	68.125
2021	68.125
2022	68.125
2023	74.375