Year	%
1961	3.084345021912085
1962	4.341589340542121
1963	3.4915794062692718
1964	2.8378186909815
1965	1.9231998037065436
1966	1.0284846410835227
1967	1.400162653424133
1968	2.740142284054639
1969	2.987357392469301
1970	3.2893302092621868
1971	1.4749885173918802
1972	0.1643790927569942
1973	-2.0767743656087707
1974	-4.170201382429829
1975	-1.4244145367959733
1976	1.1566470074661561
1977	1.6702643303065954
1978	2.6780834824918043
1979	2.567258501748498
1980	3.8108912380127147
1981	7.595054218052651
1982	6.418826731042974
1983	5.048162643449211
1984	8.225484220417764
1985	7.010893241333081
1986	7.164049119304354
1987	4.512987544674768
1988	6.020026082628753
1989	8.26516670894713
1990	10.362805758868975
1991	6.6766405650627965
1992	5.921223468180074
1993	4.589299084613541
1994	5.341614839810419
1995	6.241247833536359
1996	4.314937903285932
1997	3.7710592700584833
1998	6.792361779889724
1999	4.4284474226811525
2000	2.7752397905200215
2001	4.173151320435137
2002	2.9141635874535474
2003	1.3925100777027803
2004	0.7157852474095936
2005	1.2607355909186568
2006	3.1610820580593106
2007	2.7140428009846462
2008	0.7046886238081584
2009	4.833121719243554
2010	-0.237699890817205
2011	-0.23677317594109296
2012	1.7601103389448594
2013	1.2377166906658128
2014	1.0386389733822456
2015	3.6745334500242897
2016	1.9689052391642192
2017	0.12575223729818955