Year	Percent
1960	4.00531
1961	3.62577
1962	3.78502
1963	3.92207
1964	3.24353
1965	4.16727
1966	3.26252
1967	3.39839
1968	3.51736
1969	3.39784
1970	3.28617
1971	1.70944
1972	2.30377
1973	1.43887
1974	1.01524
1975	0.20182
1976	0.20141
1977	-0.60545
1978	-0.40568
1979	0.80972
1980	1.20242
1981	1.58106
1982	0.97562
1983	1.15831
1984	1.14505
1985	0.94429
1986	0.56233
1987	1.11525
1988	1.2856
1989	0.90827
1990	0.54103
1991	-0.18002
1992	-0.36101
1993	-0.181
1994	0.54201
1995	0.53908
1996	0.17905
1997	0.17873
1998	0.17841
1999	0
2000	0.17809
2001	0.26655
2002	0.45857
2003	0.2752
2004	0.25687
2005	0.04216
2006	-0.28318
2007	-0.38649
2008	-0.40219
2009	-0.00888
2010	1.02802
2011	-0.02636
2012	-0.14072
2013	-0.57727
2014	-0.3334
2015	-0.32204
2016	0.12823
2017	-0.0267