Year	% of output
1960	12.176551408289443
1961	12.349562007746094
1962	11.752766157578158
1963	11.663178628585499
1964	11.997706320850424
1965	11.41984110816867
1966	11.028365992414665
1967	11.023373341756159
1968	11.590464330190358
1969	10.120216320484998
1970	9.675556142319625
1971	9.064538431478644
1972	9.70091971027033
1973	9.81040225467589
1974	8.48355744907469
1975	9.14067931274208
1976	9.651356607093248
1977	7.849848314794031
1978	8.564445975625512
1979	8.26478446552921
1980	8.595664271772083
1981	7.9691966629718225
1982	8.188962135219873
1983	8.547887828491122
1984	8.174059772203654
1985	7.902504046462916
1986	6.974015816459546
1987	6.964795823999672
1988	6.5352476294450055
1989	6.605978336925186
1990	6.307540552389303
1991	5.988977342314758
1992	6.556983883346125
1993	6.9034128071492
1994	6.344078486334968
1995	6.792633502592841
1996	7.357050921942443
1997	6.847579856037961
1998	6.768645578149895
1999	6.677301437631589
2000	7.446757235025581
2001	7.3053002877564275
2002	8.101567825494206
2003	7.8793609053102776
2004	7.209589050127577
2005	7.393679158905061
2006	7.584132434431836
2007	7.163543269521512
2008	7.328512148584999
2009	7.250885772012533
2010	7.1298666307422875
2011	7.034088942723654
2012	6.5857146290466
2013	6.536584090805131
2014	4.776169946728838