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	1.0248484127927715
1972	2.302631578947368
1973	0.7730786721236926
1974	0.3614564048311734
1976	2.045772510096877
1979	0.004353315049410125
1980	0.562021366364693
1981	0.7352706115533391
1982	0.8526744863156143
1984	0.08948930368664336
1985	0.04275772587084441
1986	0.06664260126917047
1987	0.873183309924497
1988	2.193049370013356
1989	4.751803497650124
1990	9.38117133109583
1991	6.8216934498901605
1992	16.45645120597019
1993	55.827087744906166
1994	10.486659004348283
1995	10.660180474693975
1996	8.48875079080621
1997	9.249130098386924
1998	6.9366189729189855
1999	3.9724437547044675
2000	4.991642004173069
2001	1.3010452092662668
2002	4.036198704236779
2003	4.386941260829583
2004	1.2628824917392931
2005	3.533759988623877
2006	2.242097808811165
2007	2.3956045157945622
2008	1.8652970817985763
2009	1.2264614507121434
2010	1.675691118747245
2011	2.4441970275149263
2012	1.199909212208351
2013	3.805465927813525
2014	3.727584154346812
2015	3.735554696713931
2016	4.698296814506618
2017	4.942997594842829
2018	5.082126503438268
2019	6.070030732725624
2020	3.053765663610484