Year	Percent
1983	17.89677
1984	15.86564
1985	1.53898
1986	-0.30971
1987	4.51743
1988	18.37399
1989	-2.79209
1990	9.00644
1991	6.11137
1992	8.56597
1993	0.65473
1994	68.22795
1995	-6.97546
1996	4.59005
1997	11.83641
1998	3.41364
1999	2.48182
2000	2.89198
2001	2.42677
2002	2.43395
2003	2.61763
2004	7.01516
2005	0.85608
2006	9.26329
2007	-0.13768
2008	8.60201
2009	2.43784
2010	1.71769
2011	2.31358
2012	3.96016
2013	1.71854
2014	0.29631
2015	2.74197
2016	-1.57541
2017	1.24926