Year	Percent
1980	1.65836
1981	-0.09982
1982	-0.0514
1983	0.01616
1984	0.65799
1985	0.47352
1986	0.50667
1987	1.14351
1988	1.77337
1989	2.24315
1990	0.68306
1991	2.16447
1992	2.58176
1993	2.04692
1994	4.55802
1995	1.21215
1996	-0.40223
1997	-0.69825
1998	1.51683
1999	0.85527
2000	0.98235
2001	-1.14741
2002	0.02282
2003	0.77688
2004	-0.05223
2005	-0.69316
2006	-0.01867
2007	0.66769
2008	-0.24107
2009	0.19597
2010	0.08801
2011	0.00825
2012	-0.17125
2013	-0.10712
2014	0.01208
2015	-0.03038
2016	-0.19642
2017	1.47771