Year	% of total exports
2011	71.00894066943474
2012	72.98308936568414
2013	70.9848522789873
2014	73.90765014352692
2015	75.10155876622176
2016	74.82279203919941
2017	67.1460061517141
2018	58.384944818703985
2019	64.91044241747208
2020	46.10619958494565