Year	scale 1-100
1970	28.125
1971	28.125
1972	28.125
1973	28.125
1974	28.125
1975	28.125
1976	28.125
1977	28.125
1978	28.125
1979	28.125
1980	28.125
1981	28.125
1982	28.125
1983	28.125
1984	28.125
1985	28.125
1986	31.25
1987	37.5
1988	37.5
1989	37.5
1990	37.5
1991	37.5
1992	37.5
1993	37.5
1994	37.5
1995	37.5
1996	37.5
1997	37.5
1998	37.5
1999	37.5
2000	37.5
2001	37.5
2002	37.5
2003	37.5
2004	37.5
2005	37.5
2006	37.5
2007	37.5
2008	37.5
2009	37.5
2010	37.5
2011	37.5
2012	37.5
2013	37.5
2014	40
2015	40
2016	40
2017	40
2018	40
2019	40
2020	40
2021	40
2022	51.875
2023	51.875