Year	Percent
1961	5.30238
1962	5.00157
1963	5.0991
1964	5.24089
1965	5.41421
1966	4.36823
1967	5.11462
1968	4.30845
1969	5.25202
1970	-8.4943
1971	-1.00909
1972	-5.65488
1973	5.40481
1974	-18.37823
1975	-16.50948
1976	2.99317
1977	6.82409
1978	11.6853
1979	23.37262
1980	4.15519
1981	-11.22186
1982	4.33556
1983	1.33729
1984	11.7747
1985	2.74231
1986	-0.09479
1987	1.18118
1988	0.57988
1989	4.91781
1990	-3.31874
1991	-5.93584
1992	-5.63897
1993	-1.55323
1994	1.38051
1995	2.79342
1996	2.88672
1997	0.93126
1998	3.60094
1999	5.86235
2000	2.63957
2001	0.85
2002	0.704
2003	-3.32513
2004	-1.23787
2005	1.28411
2006	0.50791
2007	-0.47909
2008	-4.10226
2009	-5.8441
2010	-0.14288
2011	-0.96148
2012	1.57075
2013	-1.78347
2014	-1.43582
2015	-0.17462
2016	-2.79369
2017	0.37782