Year	% of output
1960	9.933011372487927
1961	9.559156844968268
1962	9.291989664082687
1963	9.474905571876466
1964	9.425807318493304
1965	9.436195618315855
1966	8.947307736653984
1967	8.354205524469313
1968	8.232481207932791
1969	8.322496749024708
1970	8.849866101316671
1971	9.110291469387434
1972	9.221000894082323
1973	9.14695918345116
1974	9.168533932513599
1975	9.110893165139165
1976	9.358406461349281
1977	9.193597178330297
1978	9.219376266688878
1979	9.327918391540349
1980	9.343347796889683
1981	9.2159329244593
1982	9.22816929352383
1983	9.041110183639399
1984	9.092141033545328
1985	9.081640359489464
1986	9.117660115548283
1987	9.487145513217788
1988	9.3231110857413
1989	9.36658646577402
1990	8.838202695429963
1991	9.219894959984492
1992	9.39332946375433
1993	10.089592562426747
1994	10.103940087633525
1995	10.55294627003091
1996	10.616546166890206
1997	10.457994341061017
1998	10.52028515384469
1999	10.501125091000008
2000	10.355754075855469
2001	10.26297797684197
2002	10.133753438599491
2003	9.659499666063855
2004	9.500266844825903
2005	9.510830809881561
2006	8.998311243215968
2007	8.587338789396101
2008	8.470486447705573
2009	8.31839597169003
2010	8.089531152671919
2011	7.707835373866609
2012	7.684004314771351
2013	7.534129520164804
2014	7.231428499088516