Year	% of output
1971	11.86100142157637
1972	11.927865887590428
1973	11.975641324874282
1974	11.746493020171533
1975	12.051651244050294
1976	12.088809931829704
1977	12.222218006457709
1978	11.999888854541854
1979	12.103509482141188
1980	12.355553276879125
1981	11.701859266165743
1982	12.952935523372068
1983	12.572757034196416
1984	11.862139334504846
1985	12.450480920777993
1986	13.214086859688196
1987	13.928792033265035
1988	13.856312902250442
1989	14.736089138119182
1990	14.535599059441132
1991	15.040272813761538
1992	14.85293248610502
1993	15.407665268405554
1994	15.780087695950016
1995	16.04221973112081
1996	16.108615087826177
1997	16.154613986293867
1998	15.772409314787458
1999	15.89785470288118
2000	15.86576259905572
2001	15.725349580901211
2002	15.737699582043643
2003	14.937663062837558
2004	16.019841299078298
2005	16.08844202687868
2006	16.14518147684606
2007	15.986963340282646
2008	15.869068601715043
2009	16.23971876552013
2010	15.250545792085626
2011	14.805124211575807
2012	14.768451977278154
2013	14.74292474958561
2014	15.622829717911511