Year	Percent
1960	-1.06729
1961	-2.62198
1962	1.31208
1963	-0.82817
1964	1.17375
1965	-2.04716
1966	-2.19785
1967	-1.00977
1968	-2.18793
1969	-1.37929
1970	-0.24429
1971	-0.27541
1972	0.8522
1973	3.13461
1974	-0.06472
1975	-0.45403
1976	0.1394
1977	-0.63092
1978	-0.96575
1979	-1.04843
1980	0.52682
1981	-1.83229
1982	-3.2927
1983	-2.03268
1984	-1.42881
1985	-2.04968
1986	-3.0724
1987	-1.5997
1988	-0.6606
1989	-1.83328
1990	-1.9268
1991	-0.13268
1992	0.27247
1993	-0.32095
1994	-0.51552
1995	-1.96778
1996	-0.45394
1997	0.27481
1998	-0.87928
1999	-2.44821
2000	-2.16067
2001	0.08627
2002	-0.00809
2003	-2.10685
2004	-2.71676
2005	-2.74401
2006	-1.81768
2007	-1.64642
2008	-2.5504
2009	0.21203
2010	-1.03135
2011	0.96774
2012	-0.24913
2013	-1.29814
2014	-0.42832
2015	-1.52146
2016	-2.26542
2017	0.64774