Year	scale 1-100
1970	48.125
1971	48.125
1972	48.125
1973	48.125
1974	48.125
1975	48.125
1976	48.125
1977	48.125
1978	48.125
1979	51.25
1980	57.5
1981	57.5
1982	57.5
1983	57.5
1984	57.5
1985	57.5
1986	57.5
1987	57.5
1988	57.5
1989	57.5
1990	57.5
1991	57.5
1992	57.5
1993	57.5
1994	57.5
1995	57.5
1996	57.5
1997	57.5
1998	57.5
1999	57.5
2000	57.5
2001	57.5
2002	57.5
2003	57.5
2004	57.5
2005	57.5
2006	57.5
2007	57.5
2008	57.5
2009	57.5
2010	57.5
2011	57.5
2012	57.5
2013	57.5
2014	60
2015	60
2016	60
2017	60
2018	60
2019	60
2020	60
2021	60
2022	60
2023	60