Year	Percent
1960	5.62189
1961	5.77511
1962	6.42284
1963	6.45909
1964	5.67633
1965	6.48991
1966	5.41973
1967	5.3944
1968	5.43718
1969	5.22531
1970	5.0369
1971	2.6517
1972	2.63379
1973	1.7632
1974	1.33568
1975	0.52173
1976	0.51902
1977	-0.1511
1978	0.11335
1979	1.31831
1980	1.70498
1981	2.07192
1982	1.46311
1983	1.63355
1984	1.61707
1985	1.40586
1986	1.0195
1987	1.56055
1988	1.72844
1989	1.34196
1990	0.96602
1991	0.23893
1992	-0.02702
1993	0.07204
1994	0.78899
1995	0.78503
1996	0.42441
1997	0.33472
1998	0.33141
1999	0.15326
2000	0.32981
2001	0.57186
2002	0.75814
2003	0.57074
2004	0.55048
2005	0.37803
2006	0.09534
2007	-0.01483
2008	-0.03601
2009	0.34688
2010	1.3798
2011	0.41357
2012	0.38295
2013	-0.16542
2014	-0.02898
2015	-0.0207
2016	0.42355
2017	0.25944