Year	Percent
1966	1.38197
1967	-1.93853
1968	8.02604
1969	2.46278
1970	2.38934
1971	8.16005
1972	15.1852
1973	-2.81992
1974	5.70065
1975	4.77293
1976	5.464
1977	1.08221
1978	3.98106
1979	3.98627
1980	4.67
1981	2.66291
1982	-3.28562
1983	1.71495
1984	2.81797
1985	2.85025
1986	-3.9126
1987	4.16989
1988	-2.20613
1989	-0.52146
1990	5.56517
1991	1.62237
1992	5.48074
1993	0.07664
1994	1.20037
1995	0.58427
1996	5.5016
1997	4.00143
1998	3.51257
1999	4.90233
2000	3.67935
2001	2.87864
2002	0.51496
2003	3.90867
2004	5.40943
2005	2.61704
2006	4.2775
2007	5.6532
2008	3.14356
2009	1.92214
2010	2.3617
2011	-3.02489
2012	2.80166
2013	1.68104
2014	1.77618
2015	-0.0106
2016	-0.04061
2017	0.81571