Year	Percent
1986	100.64105
1987	102.15762
1988	102.83215
1989	102.117
1990	99.11635
1991	91.26441
1992	87.26088
1993	85.88597
1994	88.31804
1995	87.75514
1996	90.39665
1997	94.25716
1998	93.34895
1999	94.86222
2000	95.71096
2001	100.61422
2002	95.8759
2003	96.67371
2004	98.18856
2005	99.05323
2006	99.44885
2007	100.82228
2008	94.02903
2009	101.90166
2010	113.77296
2011	110.04105
2012	101.38615
2013	98.4353
2014	98.12285
2015	97.07645
2016	94.33074