Year	% of total merchandise exports
1962	0.07013995367500735
1971	0.06361323155216285
1972	1.7988929889298892
1973	0.5732536237818361
1981	4.94339229601629
1982	2.223790497261841
1983	1.7043848078339567
1984	0.18622398085730188
1985	0.4042153890573119
1986	0.5229046427747658
1987	0.40060922571906543
1988	0.5288732841952402
1989	0.27894138186007306
1990	0.3457127929973355
1991	0.7401546096679241
1992	1.2817375448986865
1993	0.8843750031405362
1994	1.0883351018408758
1995	1.3915970011099752
1996	1.2078168416744186
1997	1.4097867833108506
1998	2.225092468193778
1999	2.435474275748642
2000	2.81393920904945
2001	3.3566998814907905
2002	3.153779434052137
2003	1.3673304384860767
2004	1.390407744743521
2005	1.0680108433627882
2006	1.043549589940145
2007	0.971129500342883
2008	1.480309256325269
2009	1.4594312434682752
2010	1.5957163797725684
2011	1.8406262823062978
2012	2.815805766863448
2013	3.916435669512129
2014	4.0165698562921035
2015	4.713228327540699
2016	3.7787175343867228
2017	3.174874703461065
2018	2.773216835799151
2019	2.3990452213706317
2020	2.105391327890942