Year	% of total merchandise exports
1961	1.3071895424836601
1963	1.6129032258064515
1964	0.7633587786259541
1965	1.4598540145985401
1966	0.9830540211590675
1967	1.0578279266572637
1968	0.6249442014105883
1969	1.7194403534609721
1970	0.281975051337849
1971	1.0105813815241944
1972	2.302631578947368
1973	0.7662573897226012
1974	0.3614564048311734
1976	2.045772510096877
1979	0.004353315049410125
1980	0.562021366364693
1981	0.7352706115533391
1982	0.09982530571499876
1984	0.08263711444648238
1985	0.04275772587084441
1986	0.06664260126917047
1987	0.873183309924497
1988	2.193049370013356
1989	4.751803497650124
1990	9.38117133109583
1991	6.8216934498901605
1992	16.228716620865676
1993	55.81060018584271
1994	9.853393592072331
1995	9.600745637287602
1996	8.48875079080621
1997	8.458148905614644
1998	5.940599113525489
1999	2.5002940693939033
2000	3.839646548671359
2001	1.0356597396066192
2002	3.755252766354579
2003	1.308224968197894
2004	0.9238598566052777
2005	1.1182036804022042
2006	1.8389547198351675
2007	2.1639968704724115
2008	1.6698483381821962
2009	1.1845905353216708
2010	0.9986299802523296
2011	1.1197919098323825
2012	0.9425612501772689
2013	3.714994186198254
2014	3.5675571277060643
2015	3.233797139893671
2016	3.3168666603742265
2017	3.2753677121646514
2018	3.5710262665442536
2019	4.225868630737911
2020	2.078143010770932