Year	% of total exports
2001	27.332849094115456
2002	27.601753993131606
2003	22.182076307620786
2004	23.66892222868731
2005	24.772653755374577
2006	20.129642635908322
2007	16.557920681514997
2008	17.633205532974056
2009	20.365289907081216
2010	23.12520319631236
2011	22.728968116605188
2012	23.440807205356332
2013	19.465605005534663
2014	20.059955965287855
2015	22.183927552026226
2016	23.115991440050966
2017	18.722383445240325
2018	25.66770914585284
2019	22.683749241178276
2020	9.21438436794719