Year	% of total exports
2009	6.974598471450609
2010	3.8205868464322474
2011	3.367463495076648
2012	4.0421606141892825
2013	4.394619133779803
2014	4.597857932289225
2015	4.8181688315811195
2016	4.778703499033763
2017	3.4050134400211167
2018	3.6885646042127087
2019	5.4111148098631405
2020	1.253967270393812