Year	Percent
1986	98.46841
1987	103.22892
1988	102.1451
1989	100.74842
1990	99.09996
1991	87.31648
1992	87.74558
1993	86.09225
1994	88.10815
1995	88.01455
1996	90.30876
1997	94.70437
1998	94.54862
1999	97.24619
2000	96.59928
2001	102.84596
2002	97.2195
2003	98.85531
2004	99.07922
2005	98.25453
2006	99.13147
2007	101.66069
2008	96.10978
2009	101.48151
2010	112.95623
2011	110.44169
2012	102.46228
2013	99.85166
2014	98.74113
2015	97.93545
2016	94.91654