Year	Percent
1961	0.01662
1962	0.06202
1963	2.79136
1964	1.56135
1965	-5.51785
1966	-2.61188
1967	10.65947
1968	5.54133
1969	0.42917
1970	10.34897
1971	4.66274
1972	5.26494
1973	9.33814
1974	0.55398
1975	-1.42375
1976	0.82577
1977	4.00299
1978	0.01017
1979	10.02325
1980	-3.72812
1981	3.76548
1982	-8.40473
1983	-6.36928
1984	6.0754
1985	-6.12739
1986	6.71717
1987	-7.0261
1988	0.78929
1989	7.18554
1990	5.2186
1991	-3.60557
1992	4.80918
1993	0.71041
1994	3.63935
1995	1.2006
1996	3.60061
1997	-3.23417
1998	0.35638
1999	7.96642
2000	-2.27304
2001	1.62481
2002	3.01364
2003	0.88411
2004	5.07791
2005	0.27567
2006	1.16387
2007	-1.72966
2008	0.01113
2009	-2.3846
2010	1.99893
2011	1.85989
2012	0.6556
2013	4.00572
2014	4.87736
2015	3.10609
2016	-0.35836
2017	3.02715