Year	Percent
1986	-0.00458
1987	1.18432
1988	0.22622
1989	0.06507
1990	0.08231
1991	0.5454
1992	0.12613
1993	0.74305
1994	0.5235
1995	5.37426
1996	5.68311
1997	2.35964
1998	1.73206
1999	9.00018
2000	6.34282
2001	1.60032
2002	2.37676
2003	4.81797
2004	7.31764
2005	8.28348
2006	11.87301
2007	12.66663
2008	11.78672
2009	7.36081
2010	6.9819
2011	5.4829
2012	7.30697
2013	4.82441
2014	9.71894
2015	6.01893
2016	7.64708
2017	6.27269