Year	Percent
1960	0.43498
1961	-1.62372
1962	0.14016
1963	-0.83848
1964	-0.19677
1965	1.38267
1966	1.5476
1967	0.20399
1968	1.09843
1969	1.57622
1970	1.1543
1971	2.53994
1972	2.14905
1973	-0.05353
1974	-0.82724
1975	-0.06068
1976	0.66739
1977	1.47951
1978	1.59289
1979	-0.96478
1980	-0.9736
1981	0.61325
1982	0.54819
1983	1.53452
1984	2.44586
1985	3.1903
1986	3.67358
1987	2.76845
1988	1.96361
1989	1.35137
1990	0.77677
1991	1.4982
1992	2.05435
1993	2.14183
1994	1.90283
1995	1.26411
1996	0.43364
1997	1.05697
1998	1.81694
1999	1.55456
2000	1.42932
2001	0.66007
2002	1.35083
2003	1.69546
2004	2.02171
2005	1.50939
2006	1.41402
2007	1.89274
2008	0.44906
2009	0.55093
2010	1.46051
2011	-0.54301
2012	-1.54662
2013	-2.31673
2014	-2.46517
2015	-0.41855
2016	0.97172