Year	% of output
1990	10.924454789252644
1991	10.375629275848716
1992	10.972203750498737
1993	12.12802301537355
1994	12.220912826066185
1995	14.591861305080664
1996	15.833614295347271
1997	14.58725102659554
1998	16.154435552528522
1999	13.369286468547292
2000	13.064633538944866
2001	13.785261141922355
2002	12.877986090111884
2003	12.956773200135203
2004	11.464274271066966
2005	11.737346984916508
2006	12.07443965923737
2007	11.700021992522542
2008	10.596895685916458
2009	11.47945746642086
2010	10.815303052013183
2011	10.596273291925467
2012	11.05880061040943
2013	10.607166661376837
2014	9.175183532460055