Year	% of total
1962	100
1963	100
1964	100
1965	100
1966	100
1967	100
1968	100
1969	100
1970	100
1971	100
1972	95
1973	95
1974	96
1975	100
1976	95.83333333333333
1977	100
1978	100
1979	96.66666666666667
1980	97.5
1981	95.34883720930233
1982	90.69767441860465
1983	91.07142857142857
1984	89.99999999999999
1985	93.65079365079366
1986	92.18750000000001
1987	89.70588235294117
1988	93.54838709677419
1989	93.15068493150686
1990	102.28999999999999
1991	97.25521739130436
1992	99.009
1993	101.27904761904762
1994	103.0252380952381
1995	100.00909090909092
1996	103.34272727272729
1997	102.03826086956522
1998	102.03826086956522
1999	108.41565217391305
2000	102.9580769230769
2001	94.29428571428572
2002	91.67500000000001
2003	90.5964705882353
2004	119.17750000000001
2005	91.67500000000001
2006	90.71
2007	94.57
2008	89.8415
2009	88.008
2010	91.67500000000001
2011	107.03675675675677
2012	83.68282051282051
2013	82.28390243902439
2014	84.62307692307691
2015	84.96707317073171
2016	93.26934782608696