Year	% of total merchandise exports
1960	3.4440344403444034
1961	2.792429413589823
1962	3.254804711717297
1963	2.1667760998030205
1964	1.5566625155666252
1965	1.3849543594586087
1966	1.3800820589332337
1967	0.688298918387414
1968	0.5731523378582202
1969	0.5605669314468257
1970	0.43290326805946694
1971	1.36262135059735
1972	1.2409258750506382
1973	2.4938662344582028
1974	0.7549647811054538
1975	2.011498880711191
1976	1.865035354090008
1977	1.5624288702970277
1978	0.9706328539682646
1979	0.7168403704827724
1980	0.3666247880152422
1981	0.9766199907489173
1982	1.5694222531691213
1983	14.791196783547903
1984	4.065740409050365
1985	5.867393478475893
1986	3.30658585104811
1987	2.4247376141212285
1988	1.9235749078503073
1989	1.9235749092302554
1990	2.509772557308604
1991	4.147121327959985
1992	16.669320918441173
1993	14.371209167310878
1994	12.592885106191781
1995	7.254008179320939
1996	7.238462387429692
1997	7.756893397628413
1998	7.5856939785426905
1999	7.814883453718606
2000	10.590640505675559
2001	10.836948993675682
2002	10.319437116164671
2003	9.820064721701549
2004	9.402362231396843
2005	40.0984696673836
2006	41.96887195848428
2007	47.40022323834011
2008	51.36826744449726
2009	58.99877530885248
2010	62.99775390823367
2011	51.19453232425425
2012	40.59506221364121
2013	32.117075408199746
2014	28.72409101839016
2015	15.206979964479395
2016	16.297690825996185
2017	13.966034029802962
2018	14.764321513367234
2019	17.424152018684296
2020	20.81111149170043