Year	% of output
1960	9.56218837511099
1961	9.168734491315137
1962	8.949779436715303
1963	9.076635716412659
1964	9.145109632914512
1965	9.022433273292943
1966	8.653066738719266
1967	8.094363610679475
1968	8.233031212659926
1969	8.339074636946977
1970	8.966678909307362
1971	7.951081471925426
1972	7.829387053656673
1973	7.837003204340384
1974	8.784799496115893
1975	8.49110144780051
1976	8.742353082632253
1977	8.268145189253666
1978	8.260012831087893
1979	8.321324943761615
1980	8.641454086020497
1981	8.679478453426844
1982	8.497208508282194
1983	8.411013572149642
1984	8.880753463607018
1985	8.920876243770612
1986	8.65766610923033
1987	8.9715361541898
1988	8.858688613844377
1989	8.601451743927045
1990	8.632131640703886
1991	9.80770432016606
1992	10.717445662627428
1993	11.8330550918197
1994	11.739342829228159
1995	12.211809108734009
1996	11.887707866179525
1997	11.605532315013816
1998	11.121112325544292
1999	11.172576072023618
2000	10.652215510582055
2001	10.278363790788788
2002	10.008936955900433
2003	9.53715211748844
2004	9.180961794401599
2005	9.115907562682203
2006	8.74880128144331
2007	8.876198622239553
2008	8.313179914555121
2009	8.480238871271496
2010	8.152576739906456
2011	7.547181687525571
2012	7.8203205891071885
2013	7.507269932765247
2014	7.370623073161168