Year	% of output
1960	9.404164629029239
1961	9.171518427216771
1962	8.900574189682342
1963	8.74633738478853
1964	8.625181737032012
1965	8.679052316537614
1966	8.727310619853434
1967	8.433549714614468
1968	8.335888385881033
1969	7.9717483292396265
1970	8.038683637041999
1971	8.172434512215895
1972	8.27875931846168
1973	8.144956580344395
1974	7.907601373176857
1975	8.333237928063442
1976	8.369735570858875
1977	8.130368286362557
1978	8.245687723708617
1979	8.113763122172385
1980	8.26081883804335
1981	7.75703713722803
1982	8.077149517074293
1983	8.222918219076005
1984	7.617519961442542
1985	7.849153824875593
1986	7.519571679149734
1987	7.241291268309837
1988	7.128191366741802
1989	8.767406202791902
1990	8.475500159190089
1991	7.96847653825609
1992	8.068137959352944
1993	8.426932432641184
1994	8.37178816121497
1995	8.567922941665351
1996	8.712927304029417
1997	8.40054528046708
1998	8.635639414286889
1999	8.683603486761406
2000	8.85373928408714
2001	8.622984818892268
2002	8.968891029541481
2003	8.647416168099555
2004	8.833371851906715
2005	8.864808152196478
2006	8.652721741023292
2007	8.477659847732726
2008	8.40256909312112
2009	8.600808010319398
2010	8.264140290472406
2011	8.165723048016611
2012	8.268636013259652
2013	8.200009316177542
2014	8.250599184777236