Year	% of output
1960	9.592796834595134
1961	9.18839181867181
1962	8.976466961257836
1963	9.224415990616754
1964	9.256011189804845
1965	9.251318246168367
1966	8.889350924280802
1967	8.338556902075497
1968	8.338808146522025
1969	8.339971088886923
1970	8.808871851040525
1971	9.857410388671683
1972	9.924499266633005
1973	10.003679089680222
1974	10.065917918042661
1975	10.061745422139236
1976	10.226168018321257
1977	10.148602584797857
1978	10.30989702771079
1979	10.29397637484604
1980	10.48105013297522
1981	10.538733808978922
1982	10.830152225624515
1983	10.758874854657249
1984	10.730236455442276
1985	10.973025127134472
1986	10.895599059510987
1987	11.36919882524889
1988	11.065729893423173
1989	11.381749538071707
1990	10.052094848200694
1991	10.513749031181804
1992	10.71631097226911
1993	11.338476173095458
1994	11.471159098267375
1995	11.830994149661528
1996	12.206990130790347
1997	12.285830011190708
1998	12.65493547212462
1999	13.162634583782367
2000	13.32111753265253
2001	13.369973003928175
2002	13.068009371866836
2003	12.590937416117612
2004	12.306022697958548
2005	12.19222119184308
2006	11.634811535778596
2007	11.26284232535619
2008	11.044885087586694
2009	11.01416318046157
2010	10.456523907138331
2011	10.035174540701743
2012	10.068065182238993
2013	9.962052228843465
2014	10.033938955151124