Year	Percent
1983	2.57314
1984	-3.43252
1985	-6.42343
1986	-2.97444
1987	0.3792
1988	4.49148
1989	2.67751
1990	2.85467
1991	2.03455
1992	0.02271
1993	4.82771
1994	3.02455
1995	8.03564
1996	5.71886
1997	1.90934
1998	1.71483
1999	4.70547
2000	-0.14586
2001	1.73204
2002	5.08337
2003	2.84706
2004	3.15142
2005	2.69859
2006	7.01057
2007	4.7273
2008	5.02352
2009	3.19062
2010	2.07668
2011	5.71808
2012	0.36785
2013	0.14742
2014	1.64291
2015	1.75137
2016	1.26852
2017	0.62971