Year	Percent
1993	100.24552
1994	96.38974
1995	96.03263
1996	96.59751
1997	98.52679
1999	100.9179
2000	103.92513
2001	105.46561
2002	101.46317
2003	100.5112
2004	98.9709
2005	96.77939
2006	98.59583
2007	103.77746
2008	102.02061
2009	102.31606
2010	102.00779
2011	101.38226
2012	99.51285
2013	99.43869
2014	98.56692
2015	100.26583