Year	% of output
1960	3.0737704918032787
1961	2.486910994764398
1962	3.0821917808219177
1963	3.616236162361624
1964	4.037685060565275
1965	3.760913364674278
1966	4.717655468191565
1967	4.694167852062589
1968	4.708362614195362
1969	4.930555555555555
1970	5.969049373618276
1971	5.476369092273068
1972	5.409356725146199
1973	6.312769010043041
1974	8.454106280193237
1975	7.115749525616698
1976	6.295620437956205
1977	6.073943661971831
1978	5.88235294117647
1979	5.100182149362477
1980	2.7233115468409586
1981	9.615384615384617
1982	13.837638376383765
1983	13.404255319148936
1984	9.851301115241636
1985	7.7071290944123305
1986	4.081632653061225
1987	5.3633217993079585
1988	16.071428571428573
1989	14.873417721518987
1990	14.423076923076922
1991	15.549215406562054
1992	16.060606060606062
1993	14.456035767511178
1994	16.63778162911612
1995	27.92607802874743
1996	22.727272727272727
1997	24.137931034482758
1998	39.07103825136612
1999	35
2000	9.715639810426541
2001	4.728950403690888
2002	1.46011396011396
2003	1.4700609537468627
2004	1.1531638083973978
2005	3.464755077658303
2006	3.230376877302352
2007	3.5613870665417062
2008	4.292002934702861
2009	3.6802030456852792
2010	3.777089783281734
2011	4.566037735849057
2012	4.388828436706564
2013	6.5440778799351005
2014	6.299212598425196