Year	scale 1-100
1970	29.375
1971	29.375
1972	29.375
1973	29.375
1974	29.375
1975	29.375
1976	29.375
1977	29.375
1978	29.375
1979	29.375
1980	29.375
1981	29.375
1982	29.375
1983	29.375
1984	29.375
1985	29.375
1986	29.375
1987	29.375
1988	29.375
1989	29.375
1990	29.375
1991	26.25
1992	26.25
1993	26.25
1994	26.25
1995	26.25
1996	26.25
1997	26.25
1998	26.25
1999	26.25
2000	26.25
2001	26.25
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	28.75
2011	28.75
2012	28.75
2013	28.75
2014	31.25
2015	31.25
2016	31.25
2017	31.25
2018	31.25
2019	31.25
2020	31.25
2021	31.25
2022	31.25
2023	31.25