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	134.45666666666665
1991	121.67772727272725
1992	91.04275862068965
1993	108.5432
1994	107.07639999999998
1995	101.86111111111111
1996	104.77142857142859
1997	102.67600000000002
1998	96.67545454545454
1999	100.00909090909089
2000	104.4539393939394
2001	99.53285714285714
2002	94.96589743589745
2003	98.38292682926829
2004	105.42624999999998
2005	104.64365853658538
2006	100.84249999999999
2007	102.03826086956522
2008	100.07854166666668
2009	36.67
2010	107.01653061224489
2011	100.66274509803921
2012	72.83069444444445
2013	111.57042553191489
2014	110.01
2015	111.50673469387755
2016	111.4768