Year	Percent
1960	1.55533
1961	-1.03335
1962	-0.43243
1963	-1.339
1964	-2.39967
1965	-0.81382
1966	0.36758
1967	-0.4288
1968	-1.72886
1969	0.29535
1970	-0.06837
1971	-1.54367
1972	-0.6477
1973	-2.17452
1974	-8.01596
1975	-10.61093
1976	-7.91862
1977	-7.25337
1978	-7.29418
1979	-9.39965
1980	-12.56507
1981	-14.03351
1982	-14.48292
1983	-10.64192
1984	-8.00992
1985	-6.13471
1986	-3.4819
1987	-5.61191
1988	-3.89678
1989	-4.00243
1990	-3.04468
1991	-8.40128
1992	-9.17813
1993	-3.00529
1994	-5.2291
1995	-4.83354
1996	-8.29645
1997	-7.17135
1998	-8.47095
1999	-9.15555
2000	2.56488
2001	-1.3976
2002	-3.43839
2003	-2.34191
2004	-2.27439
2005	-9.22371
2006	-7.59759
2007	-0.77995
2008	4.50602
2009	-4.02943
2010	2.51139
2011	2.02359
2012	-6.28262
2013	-6.0474
2014	-3.16057
2015	-2.73635
2016	-2.69823
2017	-2.1235