Year	% of output
1990	6.675979279436587
1991	7.424625692213032
1992	8.69748964584566
1993	16.123724909509708
1994	17.395104895104897
1995	21.10893822615898
1996	19.69680325167527
1997	16.38099370796268
1998	18.413331768571766
1999	17.79148524431543
2000	14.577704686949373
2001	16.079217258045503
2002	14.788319455846135
2003	11.733438330544345
2004	10.791925465838508
2005	10.80842724154826
2006	11.066584463625153
2007	11.10746513535685
2008	10.679519894149891
2009	10.092265633899078
2010	8.076211045973466
2011	7.360583262235322
2012	7.345199298069692
2013	6.8022598870056505
2014	6.765225775349509