Year	% of output
1971	11.837443980366452
1972	11.936862505671284
1973	11.9887794296381
1974	11.752630833844556
1975	12.023629485411188
1976	12.065736454220414
1977	12.161173776733964
1978	11.943678083574456
1979	12.056613453239581
1980	12.494750221043324
1981	11.65747105042743
1982	12.8648507767528
1983	12.484817490251231
1984	11.787269836656142
1985	12.56935592517747
1986	13.31661160495691
1987	14.018518484557843
1988	13.96352208749514
1989	14.828675206800497
1990	14.53446138671927
1991	15.049653581493715
1992	14.870236611180367
1993	15.442828168276884
1994	15.826783044799152
1995	16.101192152199452
1996	16.164017993998673
1997	16.205136785744166
1998	15.814550057583766
1999	15.920661949977742
2000	15.864335068584044
2001	15.721860589867646
2002	15.73322814212027
2003	14.94215377612563
2004	16.01134867674429
2005	16.07676847756544
2006	16.144348841918873
2007	15.999170483961755
2008	15.869261825442512
2009	16.229663778567456
2010	15.258946660132965
2011	14.816084584262287
2012	14.780575793302901
2013	14.750888498891882
2014	15.618667277425265