Year	% of total
1960	100
1961	100
1962	100
1963	100
1964	100
1965	100
1966	100
1967	100
1968	100
1969	100
1970	100
1971	100
1972	100
1973	100
1974	100
1975	100
1976	100
1977	100
1978	100
1979	100
1980	100
1981	100
1982	100
1983	100
1984	100
1985	100
1986	100
1987	100
1988	100
1989	100
1990	95.342
1991	95.342
1992	119.17750000000001
1993	95.342
1994	95.342
1995	95.342
1996	95.342
1997	95.342
1998	95.342
1999	95.342
2000	95.342
2001	102.67600000000002
2002	97.78666666666666
2003	94.29428571428572
2004	104.77142857142859
2005	96.25875
2006	105.42624999999998
2007	105.42624999999998
2008	93.71222222222222
2009	101.86111111111111
2010	99.009
2011	102.67600000000002
2012	94.73083333333334
2013	94.73083333333334
2014	94.73083333333334
2015	94.73083333333334
2016	100.84249999999999