Year	% of total exports
1998	11.581843035301167
2002	11.307999670112162
2003	11.038249656397754
2004	12.764878276536727
2005	10.953253888503104
2006	11.902378686826099
2007	12.259774037097632
2008	11.505857075721249
2009	11.28899371840378
2010	11.690465698726062
2011	9.957788843607123
2012	11.206421906931535
2013	11.63270639049217
2014	12.31568469214831
2015	12.976047777183089
2016	13.366167932874223
2017	12.772979365323138
2018	13.140261782878937
2019	14.462164232455411