Year	% of merchandise exports
1978	2.313207751905129
1979	2.966798590098284
1991	34.61394992437752
1992	28.72912000885009
1993	22.95967361605874
1999	2.437767905390895
2000	2.1968752104048037
2001	2.445161507845131
2002	1.8148500041754785
2003	1.6983344454861513
2004	1.389342460554182
2005	2.052210562161388
2006	1.3897467804815176
2007	1.3762931383028483
2008	1.6812950614273658
2009	1.3939380424089798
2010	1.5609993614382733
2011	1.7117889068818395
2012	2.2542478150776515
2013	2.11973744371733
2014	2.5397708128925087
2015	3.557887321687168
2016	3.713786240697519
2017	3.906870573377225
2018	4.124541900198453
2019	3.2767365526044365
2020	3.5776152328590385
2021	4.3968078462422175