Year	% of output
1971	9.777444361090271
1972	9.983836876787269
1973	10.165309647174931
1974	10.379829731499672
1975	10.755589822667694
1976	11.454575270580518
1977	11.986979903764507
1978	12.151815181518153
1979	12.4
1980	12.645863033951107
1981	12.90004692632567
1982	7.596562721474132
1983	9.092314231616369
1984	13.855898653998416
1985	22.159705003496725
1986	10.748864451350705
1987	14.770775531774344
1988	14.31531076301162
1989	13.527335590290281
1990	9.955982582355169
1991	9.98961531515261
1992	10.317877315118876
1993	10.496694284040506
1994	9.920087619665747
1995	10.653846153846153
1996	7.326804497642366
1997	6.467789416033409
1998	6.921195565860941
1999	7.161106650120447
2000	13.756830426269786
2001	13.094065944621889
2002	12.648278955039801
2003	11.304539676202683
2004	12.15707953681675
2005	11.596283006716348
2006	10.885821483965444
2007	10.484380119716452
2008	9.946581196581196
2009	9.597122302158272
2010	10.162402245292787
2011	8.467275707406326
2012	11.119007702213475
2013	11.13656649806605
2014	10.952966404574696