Year	scale 1-100
1970	55
1971	55
1972	55
1973	55
1974	55
1975	55
1976	55
1977	55
1978	55
1979	55
1980	55
1981	55
1982	55
1983	55
1984	55
1985	55
1986	55
1987	55
1988	55
1989	55
1990	55
1991	55
1992	55
1993	55
1994	55
1995	55
1996	55
1997	55
1998	55
1999	55
2000	55
2001	55
2002	55
2003	55
2004	55
2005	55
2006	55
2007	70
2008	70
2009	70
2010	72.5
2011	72.5
2012	72.5
2013	75
2014	75
2015	75
2016	75
2017	75
2018	75
2019	75
2020	75
2021	75
2022	75
2023	75