Year	Percent
1960	1.36061
1961	2.47748
1962	2.41758
1963	2.36052
1964	2.51572
1965	2.45399
1966	1.79641
1967	1.96078
1968	1.92308
1969	1.88679
1970	1.85185
1971	-0.72727
1972	-0.7326
1973	-0.73801
1974	-0.74349
1975	-0.74906
1976	0.37736
1977	0.37594
1978	0.37453
1979	0.37313
1980	1.6171
1981	0.69508
1982	0.7248
1983	0.86746
1984	0.88146
1985	0.84186
1986	0.85065
1987	0.81384
1988	0.86086
1989	0.84666
1990	0.82426
1991	-0.51411
1992	-0.72178
1993	0.53759
1994	0.69598
1995	0.71814
1996	0.64105
1997	0.61202
1998	0.73723
1999	0.56118
2000	0.89418
2001	1.08518
2002	0.65276
2003	0.65647
2004	0.65535
2005	0.64951
2006	0.57518
2007	0.56569
2008	0.59333
2009	0.55613
2010	-0.78006
2011	-0.8599
2012	0.36243
2013	0.31328
2014	0.2123
2015	0.15352
2016	0.15635
2017	0.15304