Year	Percent
1961	1.17629
1962	-2.79158
1963	-1.01716
1964	1.27748
1965	-0.04741
1966	1.99017
1967	-4.61028
1968	0.98263
1969	5.09692
1970	1.79576
1971	-0.55139
1972	-1.43041
1973	0.25239
1974	2.82291
1975	5.86813
1976	3.5237
1977	0.89881
1978	4.68293
1979	5.46361
1980	5.12629
1981	0.89319
1982	-10.34576
1983	-10.85319
1984	-1.77627
1985	0.8176
1986	8.12307
1987	7.32293
1988	0.8483
1989	0.45306
1990	-0.38006
1991	2.80952
1992	7.1514
1993	1.90493
1994	6.4955
1995	-2.15652
1996	4.82283
1997	7.78526
1998	3.84812
1999	-2.44829
2000	-2.28211
2001	-4.01343
2002	-7.75058
2003	0.87003
2004	5.05284
2005	7.41115
2006	3.92885
2007	6.26403
2008	6.82165
2009	3.87364
2010	7.4309
2011	4.81397
2012	3.19822
2013	4.2928
2014	2.89036
2015	0.01957
2016	1.32207
2017	2.27822