Year	% of total exports
2003	60.20984766873253
2004	50.12311461769174
2005	45.133900480312874
2006	37.66922970721393
2007	35.48699091444093
2008	28.59770685917326
2009	33.924173084464734
2010	38.71897894901937
2011	29.073185163652415
2012	36.558837356215285
2013	35.20436291829128
2014	36.25708930510033
2015	36.4159582257013
2016	39.04738177024661
2017	42.69285222819156
2018	45.37386109235077
2019	47.87348218051084
2020	27.002595841837095