Year	Percent
1961	15.25399
1962	-0.11496
1963	-2.62161
1964	-0.36204
1965	0.86978
1966	-1.56207
1967	0.8135
1968	1.36358
1969	-3.79253
1970	-2.61457
1971	0.66594
1972	0.07419
1973	0.20847
1974	0.27774
1975	-1.13118
1976	-0.10629
1977	1.09377
1978	1.36496
1979	3.5917
1980	3.7782
1981	2.29982
1982	-0.06456
1983	1.09746
1984	4.99189
1985	10.19704
1986	4.67887
1987	5.05288
1988	12.09565
1989	8.6238
1990	5.72459
1991	6.68399
1992	8.19825
1993	15.2022
1994	20.60061
1995	13.67054
1996	6.5011
1997	1.62216
1998	-0.89259
1999	-1.26841
2000	2.06146
2001	2.04312
2002	0.60485
2003	2.60544
2004	6.95432
2005	3.90264
2006	3.92791
2007	7.80502
2008	7.82741
2009	-0.1339
2010	6.94445
2011	8.15215
2012	2.39248
2013	2.22523
2014	0.82837
2015	0.09333
2016	1.13802
2017	4.05448