Year	Percent
1961	0.22603
1962	-2.83623
1963	-0.91146
1964	1.02397
1965	-1.4898
1966	-0.01023
1967	-4.00711
1968	3.26371
1969	-9.25169
1970	5.38332
1971	-3.12029
1972	3.17049
1973	-8.40353
1974	1.20855
1975	4.61949
1976	6.15774
1977	-5.02444
1978	-6.22578
1979	4.39259
1980	-5.80948
1981	2.18819
1982	4.75133
1983	-8.12658
1984	0.63088
1985	0.17113
1986	0.00704
1987	2.89738
1988	-3.58642
1989	0.84765
1990	-3.65995
1991	-0.52541
1992	-1.7843
1993	-1.66819
1994	-2.83637
1995	2.53944
1996	-0.57363
1997	0.62961
1998	3.40406
1999	3.85064
2000	0.701
2001	1.9965
2002	-1.88521
2003	3.94262
2004	3.11717
2005	2.85024
2006	-0.24695
2007	2.13866
2008	0.87551
2009	-0.40823
2010	1.23284
2011	-1.18196
2012	1.34363
2013	0.40165
2014	1.02862
2015	3.39418
2016	3.73161
2017	3.8298