Year	Percent
1960	-4.87186
1961	-9.10887
1962	-3.70118
1963	-4.00647
1964	-3.24284
1965	-3.46447
1966	-2.88055
1967	-1.50215
1968	-3.57426
1969	-3.09851
1970	-4.9936
1971	-5.37421
1972	-3.55778
1973	-5.35702
1974	-11.83985
1975	-9.56726
1976	-10.39566
1977	-11.65837
1978	-9.60736
1979	-8.34031
1980	-11.32485
1981	-14.91454
1982	-14.39469
1983	-9.82529
1984	-6.05408
1985	-3.03316
1986	-2.0316
1987	-4.89982
1988	-7.92685
1989	-5.93963
1990	-6.71826
1991	-7.2723
1992	-7.39062
1993	-6.97561
1994	-6.911
1995	-6.37592
1996	-7.11461
1997	-7.99648
1998	-9.16701
1999	-10.34945
2000	-11.04168
2001	-10.21607
2002	-8.26995
2003	-6.93485
2004	-8.25421
2005	-9.1033
2006	-8.2389
2007	-7.64159
2008	-9.71279
2009	-6.92085
2010	-7.55835
2011	-4.28121
2012	-0.50782
2013	1.00501
2014	0.18899
2015	0.58226
2016	1.12027
2017	1.02978