Year	% of output
1971	11.288975501113585
1972	10.42274469423946
1973	9.68280467445743
1974	9.197400933467557
1975	9.204670632297862
1976	9.19693840359616
1977	9.204453886162186
1978	10.496903790968132
1979	10.753551359463893
1980	9.539495798319328
1981	9.94094173982442
1982	9.225069078121075
1983	11.469763986899416
1984	10.123567582493441
1985	10.693984633643575
1986	10.22178792455065
1987	9.999401233459075
1988	10.214148917648425
1989	11.162986921670651
1990	11.843415986861588
1991	11.316829623465779
1992	11.89690062839493
1993	11.505631597555432
1994	12.050653594771243
1995	11.898600728387962
1996	12.054541252599954
1997	12.28287841191067
1998	12.013111835049878
1999	10.80935184840475
2000	14.507913252355236
2001	15.657504885582803
2002	14.903386853215816
2003	15.972825657634884
2004	17.390410153954637
2005	16.171079429735233
2006	16.62332540455268
2007	16.196997629707663
2008	18.53249036524736
2009	18.108052027477147
2010	17.218188922937703
2011	19.24449732302201
2012	17.405786508017282
2013	17.861807163877618
2014	18.280885311871227