Year	% of total merchandise exports
1960	11.032531824611032
1961	6.233062330623306
1962	5.8165548098434
1963	1.6839378238341969
1964	0.23148148148148145
1965	1.8626309662398137
1966	2.480270574971815
1967	1.6094420600858368
1968	1.1764705882352942
1969	3.9483498981916414
1970	3.7777344511600703
1971	1.9583670620038172
1972	2.5632233176168024
1973	1.9259810583996722
1974	1.628375547175194
1975	3.697690511859225
1976	1.5601242556401977
1977	5.561202404809619
1978	2.8562060347891736
1979	6.616909822482729
1980	4.861052007169846
1981	3.531938640433981
1982	3.0618625190511546
1983	2.791121331869486
1984	0.09483826523204483
1985	0.06405256831959971
1986	0.1662725755195608
1987	2.0531538048715356
1988	1.9696333227152214
1989	2.907182784278508
1990	1.3326129051518194
1991	2.9773053848154594
1992	3.532137210703324
1993	2.4522315121103495
1994	2.6582049894094757
1995	3.8438960049313673
1996	1.8980555046873693
1997	1.4100177601332036
1998	1.9280768282520417
1999	1.0817343606529566
2000	0.4727792274749193
2001	0.5023439803101564
2002	0.7460951310969615
2003	0.9820851699202443
2004	1.3735188192304166
2005	4.836210645755609
2006	1.591717603410699
2007	1.8494217174439294
2008	1.5636442463520392
2009	2.696302660272575
2010	7.273930519428216
2011	3.583475526794999
2012	3.799002725575705
2013	2.5666688829309736
2014	2.0678963439223668
2015	1.8582980061702337
2016	2.2191676946700807
2017	3.9741812889491643
2018	8.972507240442667
2019	5.254528909690215
2020	5.3600138892360825