Year	Percent
1960	-1.1695
1961	-0.29885
1962	-0.01034
1963	0.80363
1964	1.03311
1965	-0.11701
1966	0.03076
1967	1.01622
1968	1.21457
1969	0.10254
1970	2.54164
1971	1.66065
1972	0.93613
1973	1.43233
1974	0.19167
1975	-1.66883
1976	-0.65184
1977	-0.11904
1978	0.42045
1979	0.60918
1980	1.87847
1981	0.77086
1982	3.88497
1983	3.25454
1984	3.50206
1985	2.32555
1986	0.97683
1987	1.2026
1988	0.78892
1989	0.05994
1990	0.1772
1991	-0.52756
1992	-0.35767
1993	0.01934
1994	1.16009
1995	3.11265
1996	3.9188
1997	1.90131
1998	1.93077
1999	3.56043
2000	5.61721
2001	5.66609
2002	4.33611
2003	3.81224
2004	4.39536
2005	3.88037
2006	2.67751
2007	2.11429
2008	1.72204
2009	-1.47675
2010	-1.91682
2011	-1.19937
2012	-1.96993
2013	-1.64672
2014	-0.98383
2015	-2.47179
2016	-2.41635
2017	-2.2746