Year	Percent
1961	-1.26821
1962	3.05996
1963	6.48644
1964	2.97327
1965	0.40429
1966	8.60229
1967	2.28016
1968	4.27852
1969	1.63943
1970	0.80363
1971	3.07149
1972	4.88115
1973	0.82334
1974	3.12335
1975	4.6993
1976	7.95372
1977	1.09561
1978	-0.74657
1979	-2.82931
1980	-4.62559
1981	2.49692
1982	1.22984
1983	2.63395
1984	4.40389
1985	2.0778
1986	4.88879
1987	7.40216
1988	0.44779
1989	-1.48633
1990	7.38309
1991	-0.96725
1992	3.32424
1993	5.9319
1994	-6.17586
1995	6.17718
1996	5.68679
1997	5.88612
1998	0.71162
1999	-4.8748
2000	5.03339
2001	-7.356
2002	4.87559
2003	4.1017
2004	8.13558
2005	7.57217
2006	5.77012
2007	3.77204
2008	-0.36127
2009	-5.90556
2010	7.00582
2011	9.47495
2012	3.15926
2013	6.74848
2014	3.46927
2015	4.4041
2016	1.57344
2017	5.77887