Year	Percent
1991	74.37175
1992	70.1779
1993	90.94407
1994	119.36893
1995	99.2929
1996	84.5357
1997	84.80774
1998	63.57907
1999	90.75971
2000	77.5752
2001	79.3319
2002	71.45007
2003	114.38651
2004	117.85486
2005	111.00196
2006	112.68235
2007	122.63993
2008	73.37401
2009	133.84365
2010	156.40281
2011	107.15042
2012	117.29655
2013	95.24605
2014	89.50871
2015	78.01328
2016	84.97962
2017	106.35198