Year	% of total exports
1998	13.278399141743634
1999	13.233658470896222
2003	10.476455416415355
2007	6.887181667310929
2008	5.877570305491185
2009	8.52089679901167
2010	8.091761119822761
2011	5.441845769488133
2012	5.48385637115901
2013	5.3378359253557
2014	6.104851618650118
2015	9.029982234678682
2016	10.128475011676919
2017	10.39381204615818
2018	9.190649148941278
2019	10.740913518865934