Year	% of total exports
2011	34.00333748176882
2012	32.002821617763885
2013	32.13419544509696
2014	30.11316078205239
2015	29.374648802262087
2016	33.498449433309275
2017	36.768647026416
2018	36.76937789471013
2019	37.44420841861791
2020	9.149792336890654