Year	Percent
1982	7.86517
1983	8.25706
1984	6.51438
1985	10.23616
1986	16.17057
1987	11.01204
1988	9.06918
1989	6.8051
1990	12.24775
1991	9.46131
1992	7.44749
1993	0.06578
1994	27.17231
1995	-2.97824
1996	5.07362
1997	-0.77404
1998	2.24263
1999	6.44461
2000	3.07901
2001	3.22761
2002	8.57821
2003	9.33158
2004	5.8849
2005	6.62043
2006	17.22946
2007	6.14866
2008	7.19226
2009	-2.34233
2010	3.68138
2011	5.79486
2012	2.39161
2013	0.74567
2014	0.86568
2015	1.40685
2016	1.69274
2017	3.09611