Year	% of total merchandise exports
1966	0.06844626967830253
1967	0.45016077170418006
1969	0.029456851723826984
1970	0.0005938171755679861
1972	0.0020247218538353294
1974	0.2844380036922982
1978	0.2488211764118855
1979	0.00765883186402291
1980	0.0022970024118525324
1981	0.3375279896221504
1982	0.25106896338790985
1992	0.7123688068917982
1994	1.210997087437572
1999	0.023590246616663504
2000	0.27570795790204294
2001	0.28150231559013955
2002	0.39582858024854717
2003	0.7491957504635737
2004	1.0251591431221152
2005	1.2763750762198016
2006	2.1615158359031255
2007	0.775082659722236
2008	1.6897371301020234
2009	2.5087441512049424
2010	2.9498856255770898
2011	3.573625548064757
2012	3.4542436228555435
2013	4.471713797870589
2014	2.552603695245043
2015	1.088613181503979
2016	0.7937760143016455
2017	1.0292281692348721
2018	1.1938554445533558
2019	0.5733185616803441
2020	0.8284411986345348