Year	Percent
1961	4.96072
1962	2.02147
1963	3.47147
1964	5.41934
1965	2.81001
1966	4.90448
1967	2.24101
1968	3.93124
1969	5.9095
1970	5.9505
1971	4.64694
1972	5.59238
1973	4.31091
1974	3.76537
1975	-0.09903
1976	4.76337
1977	5.03965
1978	-0.12983
1979	5.53645
1980	1.73138
1981	-0.39862
1982	1.93812
1983	3.13963
1984	0.05757
1985	2.45057
1986	2.2364
1987	1.29305
1988	3.14975
1989	3.4201
1990	3.55355
1991	2.41399
1992	0.97609
1993	-0.29875
1994	2.00876
1995	2.51091
1996	2.21144
1997	1.97797
1998	3.46784
1999	3.35504
2000	3.12744
2001	0.88026
2002	1.15267
2003	0.45095
2004	2.09971
2005	1.54988
2006	2.94342
2007	3.39173
2008	1.14331
2009	-4.01634
2010	1.59258
2011	2.57645
2012	0.22245
2013	-0.5623
2014	0.04379
2015	-0.03505
2016	0.35974
2017	2.18678