Year	Percent
1961	1.70889
1962	-4.85516
1963	3.08411
1964	4.87297
1965	3.43823
1966	1.65264
1967	-0.88559
1968	1.74871
1969	0.74568
1970	-0.06452
1971	-3.62246
1972	4.08371
1973	1.3711
1974	0.94868
1975	-7.16006
1976	-1.58738
1977	2.34592
1978	-1.34528
1979	3.75091
1980	3.94819
1981	6.99066
1982	-0.56531
1983	-7.00516
1984	4.89537
1985	4.47213
1986	-0.75179
1987	-4.33987
1988	0.36055
1989	-5.8202
1990	5.50711
1991	0.7647
1992	-0.5626
1993	2.19519
1994	-1.41568
1995	2.60937
1996	1.09401
1997	2.58064
1998	0.93026
1999	2.27747
2000	2.7478
2001	2.19312
2002	1.50802
2003	0.34699
2004	1.33785
2005	-1.24744
2006	0.97833
2007	3.00434
2008	1.96973
2009	-0.50547
2010	-0.7153
2011	0.11635
2012	1.92534
2013	4.24019
2014	3.4336
2015	-0.69639
2016	1.13109
2017	2.71783