Year	Percent
1960	-4.76145
1961	-3.61866
1962	-2.75534
1963	-4.55618
1964	-3.4921
1965	-10.014
1966	-5.71076
1967	-6.1827
1968	-4.51167
1969	-5.19159
1970	-6.76987
1971	-10.38812
1972	-6.43638
1973	-6.10092
1974	-14.81041
1975	-8.48577
1976	-6.00176
1977	-5.46586
1978	-7.85026
1979	-10.27053
1980	-10.34114
1981	-4.90782
1982	2.91903
1983	-0.93422
1984	-0.02636
1985	-1.60012
1986	0.07145
1987	-4.05428
1988	-2.22482
1989	-3.82095
1990	-6.06288
1991	-4.64507
1992	-5.55573
1993	-7.31267
1994	-6.26032
1995	-3.53583
1996	-4.05406
1997	-4.41696
1998	-4.13253
1999	-2.43299
2000	-0.66713
2001	0.16504
2002	-1.97369
2003	-1.99302
2004	-0.84488
2005	-2.30424
2006	-3.20239
2007	-5.32017
2008	-8.8428
2009	-0.49768
2010	-1.87266
2011	-3.7379
2012	-3.8054
2013	-2.95234
2014	-2.53554
2015	-0.86842
2016	0.82672
2017	0.73165