Year	Percent
1961	0.23253
1962	-0.86276
1963	0.01772
1964	2.79409
1965	2.39945
1966	5.19718
1967	4.217
1968	2.23619
1969	4.63501
1970	3.96056
1971	2.18741
1972	1.38568
1973	-4.89932
1974	1.85246
1975	-6.20477
1976	2.3329
1977	-1.25738
1978	1.81202
1979	0.12061
1980	-7.21836
1981	-5.59351
1982	-6.00525
1983	-5.21193
1984	-4.65442
1985	-2.35679
1986	-2.0929
1987	-0.51317
1988	-0.86858
1989	-25.5137
1990	-50.23014
1991	-12.68625
1992	-33.88099
1993	-32.22209
1994	-22.25353
1995	-7.06401
1996	6.09873
1997	91.64805
1998	20.37804
1999	13.57394
2000	21.92751
2001	-0.74951
2002	1.33268
2003	-31.34159
2004	0.67633
2005	2.54387
2006	4.37515
2007	5.26024
2008	2.75748
2009	1.19656
2010	2.4291
2011	4.95567
2012	5.1175
2013	6.04789
2014	-1.69432
2015	-2.41985
2016	-4.03561
2017	-0.10212