Year	Percent
1974	0.03021
1975	0.6017
1976	-0.13245
1977	-0.2834
1978	-0.38098
1979	0.53194
1980	-0.16902
1981	-0.02764
1982	0.16257
1983	0.09816
1984	0.01779
1985	0.13467
1986	1.54509
1987	0.45589
1988	0.20523
1989	0.07157
1990	0.00074
1991	0.11222
1992	1.73691
1993	0.35808
1994	-0.11557
1995	0.38006
1996	0.37557
1997	0.08788
1998	0.00785
1999	-0.01183
2000	-0.03452
2001	-0.18626
2002	-0.07919
2003	0.00013
2004	0.23177
2005	0.44107
2006	-0.30847
2007	-0.51364
2008	-0.63145
2009	-1.75299
2010	-3.57072
2011	0.14489
2012	0.03146
2013	1.31366
2014	1.07589
2015	0.4706
2016	0.52828
2017	0.40255