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	8.45356317531697
1972	8.797620409564123
1973	9.522489815148408
1974	9.863028049131813
1975	9.553208773354996
1976	9.46068340881021
1977	9.41486359360301
1978	9.737561703185483
1979	9.494984137871903
1980	10.41488071168621
1981	10.378469301934398
1982	10.407482762518368
1983	10.339545916638428
1984	10.380749854434065
1985	10.281272943618825
1986	11.289410189215086
1987	10.944361913230175
1988	11.617363708489176
1989	11.070202497636698
1990	8.416794682093363
1991	8.716161973318744
1992	9.3606022081043
1993	10.427745635671954
1994	11.190390535795771
1995	11.306699219114517
1996	12.265188342800347
1997	12.684403555490153
1998	13.65628753948994
1999	13.575616216045328
2000	13.718772460515305
2001	13.98809244949397
2002	14.103838354808321
2003	13.75990177998152
2004	13.115861612080403
2005	12.77602581118347
2006	12.004257928737186
2007	11.622098918752634
2008	11.544320595959652
2009	11.758876749395665
2010	11.13267144039881
2011	10.943441179406111
2012	11.023373325099787
2013	11.249356281481653
2014	10.888825708497565