Year	Percent
1994	85.40311
1995	81.29585
1996	82.51637
1997	72.22942
1998	67.25077
1999	70.93701
2000	57.55302
2001	59.71667
2002	65.56454
2003	71.27568
2004	78.89239
2005	86.5368
2006	75.66178
2007	78.4605
2008	78.67074
2009	82.42829
2010	110.50554
2011	103.94764
2012	133.24785
2013	111.11065
2014	104.30245
2015	103.50705
2016	102.31473
2017	92.77869