Year	% of output
1960	9.027188484620131
1961	8.84531298566335
1962	8.585019602018441
1963	8.6481880534324
1964	8.610382319969744
1965	8.861329721066168
1966	9.249208140677903
1967	8.829332128536425
1968	8.80767809140843
1969	8.33409272291954
1970	8.624126828635058
1971	8.462180548334134
1972	8.743603485730743
1973	8.447523919860082
1974	8.354329830198362
1975	8.926030486312625
1976	9.073314459499453
1977	8.540564028686855
1978	8.928764144909149
1979	8.633416618452516
1980	8.758879353623762
1981	7.377265441643525
1982	8.135068799240516
1983	8.30366800029403
1984	6.943568918151747
1985	7.134002869999289
1986	6.625888536201958
1987	5.466642393575722
1988	5.4445759063938075
1989	9.680852940819703
1990	8.97712636647205
1991	7.03763746724661
1992	7.23281373487289
1993	7.375198062409953
1994	6.921891262464432
1995	7.002998024222637
1996	7.002577782680776
1997	6.058170153233062
1998	6.121613237099112
1999	5.916880156978545
2000	5.9677455224365605
2001	4.828127826083619
2002	6.460601133600299
2003	5.725173663184826
2004	6.395145689345601
2005	6.559869890258765
2006	6.516118482249336
2007	6.339613360939448
2008	6.00732163367469
2009	6.571756466961532
2010	6.306417687480121
2011	6.3576613700259745
2012	6.571058586439016
2013	6.29292020227128
2014	6.286488615191135