Year	Percent
1961	3.00917
1962	2.36827
1963	-7.33558
1964	2.5705
1965	-0.17238
1966	-1.02122
1967	-10.43027
1968	5.45558
1969	1.82323
1970	9.59989
1971	1.85549
1972	24.4393
1973	-12.10328
1974	-9.83393
1975	-8.61659
1976	9.20042
1977	12.06057
1978	8.68188
1979	2.38941
1980	1.51055
1981	3.71212
1982	3.63309
1983	1.39406
1984	5.80886
1985	5.43094
1986	4.87697
1987	-0.22395
1988	13.38893
1989	0.88614
1990	3.74206
1991	0.84588
1992	6.19095
1993	4.16519
1994	-1.28153
1995	7.77439
1996	1.33117
1997	3.57387
1998	4.16857
1999	2.75091
2000	1.62048
2001	1.62465
2002	6.16797
2003	7.48703
2004	3.95576
2005	2.31365
2006	7.52718
2007	-1.70793
2008	6.55171
2009	-2.17792
2010	-3.40834
2011	-0.44303
2012	1.3927
2013	1.83974
2014	0.95002
2015	1.73129
2016	1.09656
2017	1.36154