Year	% of output
1990	8.817370219332084
1991	10.237160894045385
1992	7.133515634288432
1993	12.378107209289217
1994	12.689906960310918
1995	10.94097807757167
1996	11.718231310582924
1997	13.930739021777935
1998	14.51255027042019
1999	14.046970943850098
2000	15.041763178212959
2001	15.220414406897511
2002	15.233302836230559
2003	15.306802350233205
2004	14.88690801042993
2005	16.06787595084845
2006	16.20903454384411
2007	16.885789413513205
2008	18.486406143556078
2009	13.023515542594776
2010	14.177061149984787
2011	13.985712526173174
2012	14.404383174266524
2013	14.770669003797837
2014	17.022826614861582