Year	Percent
1960	4.45099
1961	2.96304
1962	4.23649
1963	3.44067
1964	2.41727
1965	2.6274
1966	0.88548
1967	2.5271
1968	2.12353
1969	1.59657
1970	2.43144
1971	2.15642
1972	1.91709
1973	2.8214
1974	3.16058
1975	1.89611
1976	1.2562
1977	1.44371
1978	1.81171
1979	5.46545
1980	2.67008
1981	2.34823
1982	1.5525
1983	1.51941
1984	0.98297
1985	1.07426
1986	1.24583
1987	1.00675
1988	0.84047
1989	1.03591
1990	0.32132
1991	0.82923
1992	0.83965
1993	1.71777
1994	2.25203
1995	1.98013
1996	4.43861
1997	0.83251
1998	0.83481
1999	0.95513
2000	0.88159
2001	0.73696
2002	0.44285
2003	-0.1974
2004	0.77992
2005	0.43687
2006	0.64227
2007	0.85963
2008	0.59824
2009	0.21535
2010	0.73445
2011	0.67254
2012	1.10396
2013	0.40198
2014	0.70237
2015	0.8512
2016	0.61937
2017	0.74822