Year	%
1967	2.646966800074982
1968	2.110721539930543
1969	0.5687142315563963
1970	-1.829361509527888
1971	-0.44971210171017123
1972	0.29084170140193627
1973	-0.38267681300409917
1974	-5.266168892875308
1975	-12.16740698521048
1976	-3.4857900936374735
1977	-4.220039216195648
1978	-2.1213430856335176
1979	-0.3258913483817038
1980	-2.832918830971842
1981	1.5109332569157825
1982	4.2005616173381
1983	4.4732985618016485
1984	4.427354465384219
1985	6.389135547437114
1986	6.293170989893342
1987	4.0733388824985095
1988	3.7335499181348255
1989	5.471718172396264
1990	6.3788486761008825
1991	4.957660347221332
1992	6.04185527473246
1993	3.1933144135103615
1994	4.0132304216178145
1995	-4.301166931070285
1996	1.7488999753632055
1997	6.720383583185439
1998	5.884892440592936
1999	3.917477268081782
2000	4.765491917506805
2001	3.563385019221072
2002	1.8382407588140137
2003	1.2725658745619277
2004	1.7147911062796992
2005	1.6644886561683907
2006	1.801227475078279
2007	3.184462447594439
2008	1.2301623866189713
2009	-1.223114798144166
2010	-1.066845257448284
2011	-1.65299755101744
2012	-1.0230607320536957
2013	-1.583539432172256
2014	-0.8071418738427717