Year	% of merchandise exports
1974	38.32160473441682
1975	39.78162234183035
1976	37.1961449600015
1977	45.29928293754612
1978	42.28370465581263
1979	35.037648784100774
1980	48.01593257410444
1981	35.764334692467074
1982	25.63755373700355
1983	10.392659324191364
1984	5.013791904470468
1985	5.603157577813909
1986	5.14675536468219
1987	1.5348622566313788
1994	1.424899924855813
1998	0.497371223273017
1999	0.4503880139202352
2000	0.45467133645453156
2003	1.075561731919851
2009	2.8947758492138695
2010	3.932306773941337
2011	3.2360403975923795
2012	3.3068737129822834
2013	2.9925086820465667
2014	2.920746314397821
2015	3.1080970613998375
2016	3.3068835460045602
2017	3.801710886160431
2018	4.307551302047086
2019	1.9100965216101575
2020	1.9295964936453691
2021	0.9897923928201007
2022	1.6269483317380584