Year	Percent
1960	4.45096
1961	3.07217
1962	4.57473
1963	3.77313
1964	2.74284
1965	2.9461
1966	1.19742
1967	2.83344
1968	2.42438
1969	1.88964
1970	2.72025
1971	2.50918
1972	2.40996
1973	3.29499
1974	3.61737
1975	2.33635
1976	1.68119
1977	1.8514
1978	2.20456
1979	5.84358
1980	3.03478
1981	2.69306
1982	1.87444
1983	1.8295
1984	1.28237
1985	1.36202
1986	2.6649
1987	3.74045
1988	2.32536
1989	1.83125
1990	0.74727
1991	1.14527
1992	0.98678
1993	1.73877
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