Year	Percent
1961	5.18069
1962	6.0864
1963	6.29941
1964	4.98448
1965	7.52366
1966	6.22984
1967	5.39297
1968	4.53285
1969	8.47526
1970	7.04793
1971	4.6638
1972	5.07876
1973	4.07192
1974	0.79856
1975	-2.46963
1976	4.50298
1977	4.41268
1978	5.54017
1979	6.58981
1980	3.01075
1981	0.00775
1982	-2.60495
1983	-3.33547
1984	4.88175
1985	2.09578
1986	3.97506
1987	4.77653
1988	4.91151
1989	3.38995
1990	-3.70171
1991	1.58323
1992	3.89132
1993	3.76694
1994	3.22268
1995	3.58766
1996	1.1723
1997	3.90994
1998	4.92589
1999	4.86332
2000	2.98675
2001	6.08605
2002	0.78642
2003	-0.00918
2004	8.72643
2005	-1.84562
2006	-0.99121
2007	-0.58182
2008	-1.26672
2009	-1.41621
2010	0.0921
2011	0.80057
2012	1.24697
2013	0.84216
2014	0.43657
2015	0.64392
2016	-0.70037