Year	Percent
1960	1.82711
1961	1.58038
1962	0.7161
1963	0.12868
1964	-0.4126
1965	0.65509
1966	0.03968
1967	0.04089
1968	-0.28724
1969	-0.79038
1970	0.54337
1971	0.95441
1972	0.77578
1973	0.64347
1974	-1.09521
1975	0.97466
1976	-0.92953
1977	-0.16884
1978	1.047
1979	0.39828
1980	-1.53751
1981	-1.47122
1982	-2.45499
1983	-0.26717
1984	0.12913
1985	-0.36796
1986	-0.12104
1987	-1.09804
1988	-0.65877
1989	-0.68547
1990	-0.78459
1991	-0.31391
1992	0.66951
1993	1.68004
1994	1.49441
1995	1.59972
1996	1.78189
1997	3.01289
1998	2.74622
1999	2.39215
2000	1.3287
2001	1.57242
2002	1.99008
2003	1.4261
2004	1.01266
2005	0.0854
2006	-0.23331
2007	-0.71424
2008	-1.15831
2009	-0.79136
2010	-1.29119
2011	-1.9479
2012	-1.296
2013	-1.03458
2014	-1.14543
2015	-0.56645
2016	-0.81797
2017	-1.10232