Year	% of output
1960	13.54071363220494
1961	14.442613948380012
1962	13.791322314049587
1963	13.575701794753797
1964	13.627878033602986
1965	15.973413379073756
1966	13.61763124888013
1967	13.908509922637066
1968	14.63336535382645
1969	14.046091015169196
1970	11.763915030922291
1971	11.28419452887538
1972	12.183257918552036
1973	12.489787581699346
1974	12.409920449227888
1975	10.699934585552752
1976	12.283495918773642
1977	10.613430127041742
1978	10.904856497020344
1979	11.058020477815699
1980	12.297777193213205
1981	12.044270833333332
1982	13.576870482516116
1983	11.909377942724202
1984	11.57593123209169
1985	12.599681020733652
1986	11.954543218379495
1987	12.535442471272946
1988	12.56913470115968
1989	11.62080707659791
1990	11.156587396796274
1991	11.114101184068891
1992	11.491071127164703
1993	11.126169732171668
1994	11.444437352396758
1995	10.04706734250543
1996	10.0793212656536
1997	9.425172858314777
1998	8.327550312283137
1999	8.500722374982523
2000	8.413262012358205
2001	8.787471841968463
2002	7.671412924424972
2003	8.342468992498011
2004	9.05034911995003
2005	9.11925175370226
2006	7.588109354413702
2007	6.780962128966222
2008	9.20065970313359
2009	7.66339274887838
2010	7.971540854146878
2011	7.88236201048412
2012	10.32780410742496
2013	10.794712470811731
2014	10.02521218653169