Year	% of total merchandise exports
1961	6.130268199233716
1978	2.1761207021616134
1979	2.0476380218709878
1980	2.8126929522801447
1981	6.653751583339543
1982	10.085943896336751
1983	10.98744421410919
1984	8.840248653396019
1985	5.6102808799637005
1986	5.953333567122449
1987	5.8430895545081345
1988	3.4901384809064204
1989	1.5991005018038935
1990	1.5363766550432973
1991	1.2439286015664797
1992	1.2356974438848776
1993	1.3148967985780542
1994	1.0133993579560499
1995	0.9970736521277952
1996	1.002593888716154
1997	1.0470930391476194
1998	1.288625788439665
1999	1.4246342389297
2000	1.2921075010028078
2001	1.419814182285828
2002	1.5416594269856425
2003	1.5403058152793616
2004	1.4922417276597035
2005	1.5427616508662876
2006	1.6846236165217614
2007	1.9238784559421265
2008	2.094181696025531
2009	2.545073832203319
2010	2.3838823815919516
2011	2.2814538221325975
2012	2.234725573511407
2013	2.3907916075289735
2014	2.8445752405237235
2015	2.700808345260333
2016	2.764484341871861
2017	2.578420363713713
2018	2.3475251022456054
2019	2.318695673890857
2020	2.1727271121854335