Year	Percent
1983	-2.38092
1985	0.68261
1986	0.33126
1987	0.65209
1988	0.59818
1989	0.43846
1990	0.75297
1991	0.90003
1992	0.85228
1993	-1.64062
1994	0.78669
1995	0.68814
1996	0.80944
1997	0.75825
1998	0.67306
1999	0.65423
2000	1.07326
2001	-0.43339
2002	0.34598
2003	0.74337
2004	1.90849
2005	2.32402
2006	0.52368
2007	0.88184
2008	-0.91118
2009	3.82902
2010	-4.30757
2011	-0.19687
2012	-1.26881
2013	-0.0703
2014	0.69006
2015	0.49523
2016	1.13754
2017	0.69675