Year	Percent
1961	2.14927
1962	2.00397
1963	-1.26075
1964	8.38337
1965	2.25078
1966	12.34545
1967	11.09667
1968	0.17875
1969	1.52094
1970	4.37934
1971	4.19528
1972	2.56407
1973	2.23821
1974	1.63283
1975	4.55127
1976	8.529
1977	5.50082
1978	1.07423
1979	1.76824
1980	6.22614
1981	1.67424
1982	-5.96696
1983	1.13165
1984	-0.39656
1985	-2.82159
1986	5.76697
1987	2.91245
1988	3.16809
1989	-0.39943
1990	-0.79846
1991	-3.03588
1992	0.66685
1993	2.45777
1994	-0.0957
1995	3.65476
1996	1.94695
1997	3.96372
1998	3.13963
1999	2.80572
2000	8.34832
2001	6.07137
2002	-2.11673
2003	2.73627
2004	1.65507
2005	1.01808
2006	4.94027
2007	2.26737
2008	0.92905
2009	-5.808
2010	-1.32438
2011	-2.5011
2012	-5.1782
2013	-2.81561