Year	% of output
1960	9.911190053285967
1961	9.39887080704085
1962	9.241573033707866
1963	10.595028872709014
1964	10.267355650415636
1965	10.054512416717142
1966	10.502612141956403
1967	10.964417968121074
1968	11.490772779700114
1969	10.691502934422047
1970	10.054505392554795
1971	10.05009712708312
1972	10.050698212220938
1973	10.325955734406438
1974	11.041032870816947
1975	10.465339563464124
1976	9.36388995241481
1977	10.104546559688792
1978	10.070882813219184
1979	11.375543912618772
1980	12.133190118152525
1981	11.87938232075548
1982	12.492467610726123
1983	12.513255567338282
1984	12.217031979877829
1985	11.52868289546743
1986	13.722131250787253
1987	12.44109755822605
1988	13.128538128538128
1989	12.003304895857351
1990	11.610447839007351
1991	12.55021080237692
1992	13.357191648599684
1993	13.890093214827662
1994	15.119827377076392
1995	15.964613261910559
1996	16.712698446163902
1997	17.989079925650557
1998	18.730521878546593
1999	18.503091721058055
2000	19.016666399833497
2001	19.009166836422896
2002	18.494590417310665
2003	17.108997659712195
2004	15.42356235650108
2005	14.84600755760824
2006	14.07268333910005
2007	13.910669353407323
2008	13.850053926559083
2009	14.881526805330267
2010	14.309117078898526
2011	14.110718286957319
2012	14.888348865951832
2013	15.462578179001806
2014	14.816064263403753