Year	Percent
1961	-4.45903
1962	4.32331
1963	1.11957
1964	0.58958
1965	6.19678
1966	4.41786
1967	2.37572
1968	5.1488
1969	2.5576
1970	4.56359
1971	3.99458
1972	5.47294
1973	5.08088
1974	2.97348
1975	-0.42283
1976	2.86479
1977	6.13081
1978	3.52775
1979	2.20819
1980	-1.88806
1981	-4.84314
1982	-9.75089
1983	0.13201
1984	3.41264
1985	-1.5659
1986	3.11282
1987	4.22515
1988	1.26861
1989	2.47647
1990	1.31937
1991	-0.00087
1992	6.4539
1993	4.40992
1994	1.90425
1995	1.5937
1996	-1.17738
1997	3.09996
1998	4.55841
1999	1.74632
2000	1.70712
2001	1.64285
2002	1.60363
2003	2.66947
2004	2.81485
2005	2.38408
2006	5.72073
2007	6.66586
2008	3.23114
2009	-2.26692
2010	3.63532
2011	3.05568
2012	3.58893
2013	1.13302
2014	2.40189
2015	2.54799
2016	3.09659
2017	2.17172