Year	Percent
1987	104.51206
1988	105.39645
1989	105.38981
1990	101.76368
1991	96.82171
1992	97.21461
1993	96.21518
1994	96.99781
1995	99.96005
1996	102.31235
1998	98.29495
1999	95.62393
2000	96.41261
2001	102.49077
2002	100.79427
2003	101.64981
2004	100.43527
2005	99.51762
2006	96.7492
2007	98.3278
2008	98.01123
2009	97.57158
2010	99.13854
2011	98.16594
2012	100.27829
2013	98.62531
2014	98.85934
2015	98.68971
2016	101.10573