Year	Percent
1965	88.56522
1966	94.156
1967	90.62763
1968	100.11237
1969	99.86894
1970	99.95527
1971	258.70381
1972	104.12876
1973	110.60006
1974	108.51573
1975	113.15545
1976	111.94177
1977	110.75065
1978	109.49728
1979	109.20971
1980	104.54825
1981	106.06443
1982	106.44304
1983	106.4576
1984	101.25517
1985	101.79893
1986	104.00269
1987	92.32288
1988	91.12811
1989	91.8449
1990	91.29251
1991	105.08779
1992	92.81595
1993	97.15746
1994	99.42902
1995	94.90877
1996	97.25149
1997	89.85378
1998	89.11056
1999	85.23913
2000	83.48395
2001	85.67974
2002	89.98295
2003	87.65759
2004	82.30089
2005	81.20526
2006	81.18324
2007	79.75946
2008	89.56344
2009	89.90697
2010	83.49713
2011	86.87383
2012	87.00454
2013	83.2307
2014	82.50842
2015	74.10245
2016	69.24512
2017	69.13703