Year	Percent
1961	1.28233
1962	0.56542
1963	6.41224
1964	1.64632
1965	1.37912
1966	2.49318
1967	1.13734
1968	5.67388
1969	1.78774
1970	2.76931
1971	2.68523
1972	4.42305
1973	3.93222
1974	3.58908
1975	-0.66496
1976	4.69436
1977	5.15918
1978	2.44684
1979	2.17541
1980	1.23397
1981	-1.82034
1982	-5.90353
1983	-4.96392
1984	-1.94515
1985	-2.9875
1986	-2.21312
1987	1.14084
1988	1.50183
1989	1.55502
1990	0.72808
1991	1.25944
1992	2.4057
1993	1.52052
1994	1.64463
1995	2.56703
1996	0.65443
1997	2.05435
1998	2.6749
1999	1.53339
2000	1.26523
2001	-0.02047
2002	1.45133
2003	0.1388
2004	0.76251
2005	0.90173
2006	3.01229
2007	3.95084
2008	1.02416
2009	-1.64998
2010	0.66063
2011	1.94267
2012	0.79791
2013	1.53524
2014	2.03286
2015	2.03276
2016	1.04064
2017	0.74909