Year	% of total merchandise exports
1976	2.5760415332859954
1977	2.1116530040469024
1978	3.3313608170600744
1979	3.5585572387119457
1980	3.2615734744476925
1981	3.6481606170043457
1982	4.433146441128956
1983	4.433146440985374
1984	4.433146440826265
1985	4.433146441272896
1986	6.234482744793284
1987	5.51965651035263
1988	7.127010830637351
1989	5.844714501358336
1990	5.909045043262502
1991	6.078641174762166
1992	7.950415117522455
1993	8.848564428442666
1994	9.180816135095471
1995	7.982863782574368
1996	7.551294928443161
1997	7.0923326829240265
1998	10.476915881501903
1999	9.619760454137015
2000	7.4728592313399025
2001	8.659560749651368
2002	10.383219812562773
2003	8.528597284020567
2004	9.761865732543844
2005	7.3949988149271295
2006	7.014899215250385
2007	9.156396657140318
2008	8.979624183452945
2009	10.93976036142989
2010	9.50770308860357
2011	8.994044791299773
2012	9.03871973815654
2013	12.269455560577299
2014	12.304732689596955
2015	16.638065167950188
2016	17.146338280420455
2017	15.164220504752313
2018	12.804051854159201
2019	11.68150842754449
2020	12.084925916487778