Year	% of total merchandise exports
1965	0.11668611435239205
1967	0.031308703819661866
1968	0.06594856012310397
1969	0.04818503051718599
1970	0.07125890736342043
1971	0.12108792846497766
1972	0.17192680830160875
1973	0.2292654211977569
1974	0.38508037433394526
1975	0.18686073957513769
1976	0.3422171523384839
1977	0.7036156089210895
1978	0.5701399145584195
1979	0.797408919806866
1980	1.2827349721605799
1981	1.7592440234127076
1982	0.7046286497060993
1983	0.7633088436709146
1984	1.0916187331891056
1985	0.6018269392659891
1986	0.7080663237449352
1987	0.9468356035548605
1988	1.0453937441108059
1989	1.4962539389928828
1990	1.6846100841373082
1991	2.4374816359801916
1992	2.779398655400593
1993	3.2259718467418668
1994	3.655807896450346
1995	3.0186610630182042
1996	3.1032905104612234
1997	3.60616153205662
1998	4.003703787348405
1999	3.605386400589224
2000	3.5955745369644383
2001	3.8267130955864745
2002	3.2986770582822276
2003	2.8308768369543333
2004	2.8374663551991173
2005	3.1636525778998954
2006	3.981052240807201
2007	4.04638846241915
2008	4.6729156110560535
2009	4.362965480896278
2010	4.745791455753199
2011	5.078174728531432
2012	4.713749988318397
2013	4.628224569002487
2014	4.536306172020291
2015	4.21443513043016
2016	3.8292844043746483
2017	3.7011965638600346
2018	3.4564072318675003
2019	3.6330315774729915
2020	2.9311005428686796