Year	% of total exports
1995	12.636199544036309
1996	13.006926375966058
1997	14.104427364325502
1998	16.168169531014392
1999	15.667462147780377
2000	13.282161497458617
2001	20.300942005795854
2002	20.571390179178064
2003	24.520704769435213
2004	22.935193940538653
2005	13.3574549800046
2006	12.310946820115339
2007	12.295798836474727
2008	10.522230369445344
2009	15.02417891321945
2010	14.616679698865656
2011	11.322457871114786
2012	11.79268097955957
2013	10.739839760566781
2014	11.782832683392456
2015	14.403385275560268
2016	14.342881914106043
2017	15.256404918680028
2018	14.698023074646851
2019	16.878599453716152