Year	% of total merchandise exports
1981	1.6176321909085505
1992	59.14006179196705
1993	52.66032509277166
1994	45.60516708789666
1995	30.428719335685763
1996	24.150934502345095
1997	10.552774947955884
1998	11.97485078518862
1999	13.673281420078705
2000	9.174551210713354
2001	7.737719502362944
2002	9.268294777564542
2003	8.000837435263218
2004	3.029996317915709
2005	4.682990905998347
2006	3.3754477776063774
2007	3.524996530644886
2008	3.738040109494102
2009	2.2374402012750894
2010	1.8720598095283776
2011	1.7413961022699136
2012	1.723788442088275
2013	1.6562776014744727
2014	1.1790821513561462
2015	1.7380258437716563
2016	1.1924225086226676
2017	1.1843052939454888
2018	1.378219105272547
2019	1.0195047477720314
2020	1.0833784542549292