Year	Percent
1960	-3.64792
1961	-4.64574
1962	-5.59857
1963	-6.26372
1964	-7.60183
1965	-4.31278
1966	-4.0506
1967	-3.80224
1968	-3.74402
1969	-4.49209
1970	-5.78989
1971	-5.14524
1972	-4.81896
1973	-7.77148
1974	-8.41266
1975	-11.44794
1976	-10.3003
1977	-13.01857
1978	-11.54483
1979	-16.85903
1980	-11.92077
1981	-7.56086
1982	-6.93285
1983	-7.12265
1984	-6.03522
1985	-19.4204
1986	-21.98169
1987	-20.98323
1988	-15.0851
1989	-17.62724
1990	-14.42661
1991	-12.44628
1992	-13.72307
1993	-16.00044
1994	-18.77715
1995	-11.83852
1996	-11.52301
1997	-12.22543
1998	-11.07573
1999	-13.87163
2000	-17.79098
2001	-34.99033
2002	-100.97093
2003	-34.11298
2004	0.24913
2005	10.1078
2006	-0.74435
2007	4.27596
2008	5.09934
2009	-6.83276
2010	-6.6995
2011	-2.92656
2012	-3.63951
2013	-5.51773
2014	-8.3038
2015	-6.53687
2016	-11.47914
2017	-5.82581