Year	Percent
1961	-0.64701
1962	4.47212
1963	0.03457
1964	7.07289
1965	0.46865
1966	-1.98592
1967	-0.61326
1968	3.84605
1969	-2.46242
1970	4.43745
1971	-1.49632
1972	-1.59115
1973	4.13889
1974	-0.73538
1975	0.07019
1976	4.76265
1977	3.34735
1978	-0.45835
1979	-1.97417
1980	-6.98881
1981	-3.00443
1982	-4.63689
1983	-6.26346
1984	-1.17711
1985	-2.38348
1986	3.78073
1987	0.9455
1988	3.1651
1989	-10.8137
1990	3.92918
1991	7.19269
1992	3.67913
1993	-1.91451
1994	-4.43008
1995	1.78576
1996	-2.23104
1997	4.25331
1998	-1.66028
1999	-7.76755
2000	1.74072
2001	1.48729
2002	-10.50653
2003	-9.39499
2004	16.22569
2005	8.4359
2006	8.03683
2007	6.97533
2008	3.5954
2009	-4.71119
2010	-2.98441
2011	2.63744
2012	4.10732
2013	-0.07677
2014	-5.2092