Year	Percent
1960	1.73089
1961	1.99944
1962	2.54211
1963	1.98658
1964	2.09497
1965	1.64951
1966	1.79105
1967	1.78523
1968	0.87717
1969	0.89479
1970	1.35759
1971	1.49375
1972	1.76836
1973	1.95737
1974	2.08529
1975	1.94543
1976	0.88479
1977	0.31136
1978	0.03204
1979	-0.39164
1980	0.12536
1981	0.38475
1982	0.99348
1983	1.35949
1984	0.86519
1985	0.61784
1986	-0.02464
1987	0.86188
1988	0.27448
1989	0.48005
1990	0.92322
1992	1.04174
1993	1.14023
1994	1.32924
1995	1.46436
1996	1.58266
1997	1.31236
1998	0.88728
1999	0.52548
2000	0.58756
2001	0.58929
2002	1.73717
2003	1.97356
2004	1.48622
2005	1.12877
2006	1.21898
2007	0.93241
2008	0.8487
2009	0.99973
2010	1.11173
2011	0.76248
2012	0.54822
2013	0.76835
2014	1.51034
2015	1.88905
2016	2.09936
2017	2.12296