Year	% of total merchandise exports
1964	1.2404825049191548
1965	1.6030998328521502
1966	2.737382378100941
1967	2.1631205673758864
1968	3.687068114511352
1969	1.9159456118665017
1970	3.999151823579304
1971	3.774885805395156
1972	2.359545633963423
1973	2.347914757399352
1974	2.1164088907098226
1975	2.683799009997218
1976	2.068072112641303
1977	3.065309753794756
1978	2.734535107876762
1979	2.827529883942379
1980	3.2733403913265104
1981	3.4491681090819175
1982	4.981321856131482
1983	6.267906903724636
1984	6.052360151275689
1985	5.701684158430254
1986	1.3525430782493237
1987	2.3453248008009573
1988	2.585631224139669
1989	2.441830255636138
1990	2.6687024977224283
1991	3.30700496168401
1992	3.7241511245255423
1993	3.334604121401451
1994	3.9505511762882897
1995	4.885947927041273
1996	5.090375003386778
1997	4.770085422009504
1998	5.373163882859241
1999	6.90111207268262
2000	18.987077249219254
2001	18.984992482542175
2002	18.97048602903678
2003	18.986933410852714
2004	18.956266577901847
2005	18.947865686525724
2006	18.95640663899765
2007	18.952840082524997
2008	18.95445508798727
2009	18.95380749370864
2010	18.9538107139739
2011	18.953184140498408
2012	18.914125378688137
2013	18.9141127859772
2014	18.914035396461596
2015	18.91403385443069
2016	18.914093549027008
2017	17.5793405540933
2018	19.209595054284716
2019	24.21844306799215
2020	24.02134797322053