Year	Percent
1979	0.01051
1980	0.00709
1981	0.01347
1982	-0.05253
1983	0.00243
1984	0.00527
1985	0.0064
1986	0.06955
1987	-0.03275
1988	0.02175
1989	3.29224
1990	1.34798
1991	1.50221
1992	0.88769
1993	3.37387
1994	1.81462
1995	0.67171
1996	1.70683
1997	0.28745
1998	0.49618
1999	0.48178
2000	0.3642
2001	0.2127
2002	0.29122
2003	0.24731
2004	0.29683
2005	0.01304
2006	0.21978
2007	0.52128
2008	0.50535
2009	0.89988
2010	0.24704
2011	0.19837
2012	0.33195
2013	0.23835
2014	0.28134
2015	0.30611
2016	0.32223
2017	0.34171