Year	Percent
1960	-1.02512
1961	-2.55265
1962	-0.2247
1963	-0.28048
1964	-0.81307
1965	-0.45972
1966	-9.3384
1967	-8.09153
1968	-4.7074
1969	-5.8131
1970	-2.99401
1971	-2.22222
1972	-2.37949
1973	0.57304
1974	7.57751
1975	0.57425
1976	1.34159
1977	3.41176
1978	1.01952
1979	6.47611
1980	8.29429
1981	2.08359
1982	-3.91816
1983	-1.06842
1984	4.51934
1985	2.83697
1986	-0.01833
1987	2.17935
1988	2.82876
1989	3.09323
1990	1.71966
1991	1.86296
1992	3.18749
1993	2.98624
1994	1.14575
1995	-1.33426
1996	-0.61564
1997	-0.27537
1998	9.75008
1999	8.08435
2000	10.51774
2001	8.27107
2002	6.29578
2003	7.33882
2004	4.67209
2005	4.1466
2006	5.41231
2007	4.04219
2008	1.05517
2009	2.80612
2010	1.89679
2011	2.47469
2012	-0.39414
2013	-0.79022
2014	-0.74821
2015	0.38272
2016	0.80301
2017	1.20539