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	11.312429382703286
1972	11.213132338315212
1973	11.291042934821649
1974	11.353420332500486
1975	11.561961002134066
1976	11.757240640148101
1977	11.83616252026701
1978	12.101325384260244
1979	12.006463817470433
1980	12.331047328157114
1981	12.717783892148985
1982	13.187925750862835
1983	13.24947039183876
1984	12.825776751311272
1985	13.335597120076566
1986	12.696707706236413
1987	13.415002916282697
1988	13.232914431560483
1989	13.602534432785854
1990	13.212288071899303
1991	13.5688938297893
1992	13.657270610684305
1993	13.870475173590217
1994	13.994147652879095
1995	14.30167597765363
1996	14.785030756188904
1997	15.053990028815415
1998	15.755097039045387
1999	16.623379901188716
2000	17.354246236158055
2001	17.597698638053576
2002	17.252511919604967
2003	16.839688297235305
2004	16.95783386813282
2005	16.815704828663247
2006	16.216683873279695
2007	16.037902139475346
2008	15.724868960995407
2009	15.914540052845698
2010	14.881215184976892
2011	14.561298743792692
2012	14.785558147107718
2013	14.719493672794334
2014	15.255738513987815