Year	Percent
1961	7.48642
1962	5.48748
1963	4.84205
1964	1.95553
1965	2.40205
1966	5.16416
1967	6.40568
1968	5.87359
1969	5.49918
1970	4.71342
1971	1.34428
1972	3.10349
1973	6.40181
1974	4.81201
1975	-2.67318
1976	6.59232
1977	2.12583
1978	2.87294
1979	5.65322
1980	3.21717
1981	0.72323
1982	0.33922
1983	1.13249
1984	3.20278
1985	2.76838
1986	2.85437
1987	3.18143
1988	4.14404
1989	3.31086
1990	1.90044
1991	1.46818
1992	0.76581
1993	-0.9134
1994	2.13022
1995	2.8852
1996	1.25791
1997	1.7815
1998	1.58684
1999	1.54277
2000	3.66313
2001	1.71504
2002	0.09937
2003	-0.29287
2004	0.92664
2005	0.45483
2006	1.70046
2007	0.96278
2008	-1.70375
2009	-5.91171
2010	1.37423
2011	0.4038
2012	-3.0806
2013	-2.8608
2014	-0.80067
2015	1.0493
2016	1.02975
2017	1.62983