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	26.875
1988	26.875
1989	26.875
1990	26.875
1991	26.875
1992	26.875
1993	26.875
1994	26.875
1995	26.875
1996	26.875
1997	26.875
1998	26.875
1999	26.875
2000	26.875
2001	26.875
2002	26.25
2003	26.25
2004	26.25
2005	26.25
2006	26.25
2007	28.75
2008	28.75
2009	28.75
2010	34.375
2011	34.375
2012	34.375
2013	34.375
2014	34.375
2015	34.375
2016	34.375
2017	34.375
2018	34.375
2019	40
2020	40
2021	40
2022	40
2023	40