Year	% of output
1971	11.404157976182466
1972	10.507266551589732
1973	11.013238289205702
1974	9.359064533145771
1975	9.817924972531785
1976	9.688544024140532
1977	8.868898672832662
1978	8.718589899975603
1979	12.734787840736672
1980	12.255563461491278
1981	16.414302978602404
1982	11.451702482163455
1983	11.492612322846517
1984	13.751153462270013
1985	12.73532668881506
1986	11.577469966081305
1987	12.541772490308782
1988	12.964158863416209
1989	12.978356336260978
1990	15.497502881290819
1991	15.98315749929562
1992	15.372518766875352
1993	12.354025814382299
1994	13.890420019843457
1995	14.283664070348483
1996	15.718439606813854
1997	15.433302714197632
1998	14.889224453200576
1999	15.709990126559555
2000	15.643521049753964
2001	15.900609528548326
2002	16.173333585033884
2003	15.558625453289586
2004	16.374152913256513
2005	20.90518583079126
2006	21.929019617569008
2007	21.441851024964482
2008	25.426144235869746
2009	24.385657833388112
2010	22.375485473579065
2011	23.137264621504563
2012	21.93737259558903
2013	23.638780474008712
2014	27.822474147213587