Year	% of total merchandise exports
1960	2.695741758241758
1961	0.5584415584415584
1962	0.22468544038346314
1963	0.9991184249191889
1964	0.9021708486044545
1965	0.3315554274181923
1966	1.011931732366712
1967	0.38220455587830604
1968	0.013386880856760375
1969	0.02358490566037736
1970	0.009042408897730355
1972	0.3498673889735342
1973	0.1686656671664168
1974	0.8794731242171611
1975	0.9630954224806747
1976	0.8565009828699803
1977	1.5240220167245973
1978	1.3905589720685745
1979	0.8505311807940431
1980	1.5303957400791206
1981	1.2297199111308972
1982	0.6365779573139363
1983	0.7968710191834076
1984	1.205220949562485
1985	1.735816193783531
1986	2.235711970613656
1987	2.09865115818765
1988	2.651908042418144
1989	2.728232287539403
1990	2.505675254554072
1991	2.977006709551234
1992	3.0116221686920226
1993	3.5553012378211637
1994	4.363307179846224
1995	4.965281049594971
1996	4.7089744412509145
1997	5.807556023664983
1998	7.017653786907116
1999	7.527753269424375
2000	6.953513374524865
2001	7.403479937628083
2002	8.331704766146908
2003	8.700242512164683
2004	9.23587775836317
2005	9.955397202603212
2006	10.12918648307778
2007	12.048780932868889
2008	13.0438101249452
2009	13.629468034336387
2010	13.867116819728862
2011	14.377850587969357
2012	14.747528515723667
2013	15.827698392786713
2014	16.7970132314569
2015	17.450015932257486
2016	17.593773172032794
2017	17.80349866420021
2018	17.006787063135942
2019	16.004580466503544
2020	15.484888452298199