Year	% of total merchandise exports
1960	0.02446183953033268
1961	0.0839806844425782
1962	0.15214910612400154
1963	0.3907703758838854
1964	0.0749400479616307
1965	0.08987417615338526
1966	0.18288700195950358
1967	0.32299741602067183
1968	0.10421491431218156
1969	0.08556495999259979
1970	0.059169338830355786
1971	0.11411310622587684
1972	0.22415834884114363
1973	0.08939695099335229
1974	0.2544596185078277
1975	0.4129470151438932
1976	0.6200626024742883
1977	0.7204378045119727
1978	0.5894108421239027
1979	0.0021767996691264505
1980	0.5995779706827576
1981	0.7164616773088639
1982	0.26484212257427914
1983	0.041903180373791885
1985	0.19794937864025552
1986	1.4130564983030547
1987	1.8867707237675528
1988	0.9837138638569766
1989	1.045143538454614
1990	0.698153204231102
1991	1.1586877097219048
1992	1.4000849510383542
1993	1.2155209612639823
1994	0.5490320159952392
1995	0.8788098616089886
1996	1.2024023104710904
1997	0.8066357043800916
1998	0.7314932813846495
1999	0.8648003529905851
2000	0.675762630315409
2001	0.4831871145775623
2002	0.6300902243711127
2003	0.4039186634505057
2004	0.27910284745652636
2005	0.2586224760815413
2006	0.3248204726230602
2007	0.3923959550803424
2008	0.24442392132524235
2009	0.1680326914825252
2010	0.27063750131765174
2011	0.1974557187911372
2012	0.1594604017442629
2013	0.09268704277744826
2014	0.09743287572018533
2015	0.1357696129649643
2016	0.06368932106241582
2017	0.05909200101972241
2018	0.07898093198210716
2019	0.05114967553217567
2020	0.08555928237296549