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	9.41043479661786
1972	9.30053259188189
1973	9.344514957174143
1974	9.403733306246654
1975	9.402457114601955
1976	9.453252805362244
1977	9.515688451905229
1978	9.631681805548816
1979	9.69466560562976
1980	9.911742458172842
1981	9.803656428997595
1982	10.011694683091891
1983	9.822528884533368
1984	9.473060352132386
1985	9.619640775871913
1986	9.545453015956337
1987	9.78088700127046
1988	9.598506466667498
1989	9.964284423337327
1990	9.177806023211938
1991	9.482873952771424
1992	9.727600800688247
1993	10.342230572651001
1994	10.355642111810008
1995	10.611523335517854
1996	10.791832616670971
1997	10.790861694737908
1998	10.929329358094758
1999	11.00760797939256
2000	10.915895493119937
2001	10.7530103720319
2002	10.565589310627635
2003	10.109491291354136
2004	10.05056362799206
2005	10.107557938310213
2006	9.634151712628448
2007	9.29985224128963
2008	9.32129143306141
2009	9.275405739470814
2010	8.980400972906981
2011	8.555288802752381
2012	8.627732281502482
2013	8.54917675067114
2014	8.32097000366301