Year	% of output
1971	11.227123416236509
1972	10.924557868815759
1973	11.282226785306868
1974	10.229106163278477
1975	11.337608795235914
1976	10.887140239301498
1977	11.333878887070377
1978	10.733590733590734
1979	11.406502604634452
1980	12.271296059909794
1981	11.128736016029388
1982	12.214640721084997
1983	14.49619771863118
1984	13.477068978291474
1985	13.732193732193732
1986	13.21215409658166
1987	14.74707424697832
1988	14.815252734259532
1989	11.37499298186514
1990	10.575876333551056
1991	11.166775211662742
1992	10.606805884720297
1993	11.998500187476566
1994	10.962535110970448
1995	10.443500909836944
1996	8.557576546383366
1997	8.105835360542992
1998	8.175392154101777
1999	5.782755926022402
2000	7.293278107690004
2001	7.359337894712093
2002	6.18030271805088
2003	6.085972367550022
2004	7.877675363224496
2005	8.6502553159058
2006	8.864786695589299
2007	8.43459980515818
2008	8.5103175666622
2009	10.546424689568855
2010	8.218883410000993
2011	7.132530853864533
2012	5.016415535261143
2013	6.692670909464176
2014	6.735041779616019