Year	Percent
1960	3.33606
1961	1.09579
1962	1.14315
1963	1.32253
1964	1.3822
1965	0.97629
1966	0.74787
1967	0.96173
1968	0.95673
1969	0.78234
1970	0.35576
1971	0.36426
1972	0.82672
1973	0.90811
1974	0.95979
1975	0.9936
1976	0.9978
1977	0.96387
1978	0.79406
1979	0.80219
1980	0.92327
1981	0.90787
1982	0.92028
1983	0.93769
1984	0.90459
1985	0.80359
1986	0.68107
1987	0.5642
1988	0.41446
1989	0.36166
1990	0.3924
1991	0.35468
1992	0.30668
1993	0.25445
1994	0.21101
1995	0.13572
1996	0.07607
1997	0.06546
1998	0.03575
1999	-0.0083
2000	-1.04434
2001	-0.02759
2002	-0.04632
2003	-0.06749
2004	-0.05851
2005	-0.04395
2006	-0.06337
2007	-0.05431
2008	0.01364
2009	0.06776
2010	-0.28561
2011	0.05377
2012	-0.00024
2013	-0.06036
2014	-0.07485
2015	-0.06664
2016	-0.04299
2017	0.01515