Year	scale 1-100
1970	26.875
1971	26.875
1972	26.875
1973	26.875
1974	26.875
1975	26.875
1976	26.875
1977	26.875
1978	26.875
1979	26.875
1980	26.875
1981	26.875
1982	26.875
1983	26.875
1984	26.875
1985	26.875
1986	26.875
1987	30
1988	33.125
1989	33.125
1990	33.125
1991	33.125
1992	33.125
1993	33.125
1994	33.125
1995	33.125
1996	33.125
1997	33.125
1998	33.125
1999	33.125
2000	33.125
2001	33.125
2002	33.125
2003	33.125
2004	33.125
2005	33.125
2006	33.125
2007	33.125
2008	33.125
2009	33.125
2010	33.125
2011	33.125
2012	33.125
2013	33.125
2014	33.125
2015	33.125
2016	45
2017	45
2018	45
2019	45
2020	45
2021	45
2022	48.125
2023	48.125