Year	% of total merchandise exports
1960	100
1961	100
1962	100
1963	100
1970	62.53935681729135
1971	59.22324580773294
1972	60.860538460601774
1973	57.860827547178026
1974	54.82022844616227
1975	55.614264401821366
1976	53.84426161057596
1977	55.37583122164714
1978	56.69856645781951
1979	55.59234762888664
1980	51.28876566331721
1981	54.467209160692
1982	48.29713420472511
1983	47.69542400364712
1984	48.032155929768436
1985	48.26839458826292
1986	50.120733595114665
1987	45.89334674659015
1988	39.750841413458026
1989	37.66245402498755
1990	23.858299519848742
1991	20.361129547030995
1992	7.910121146286484
1993	3.0683744832291002
1994	2.81970240235088
1995	2.738995652246444
1996	3.0083731284358013
1997	0.5105322862688202
1998	0.4685117516694383
1999	0.3406395775819092
2000	0.5387669273919686
2001	0.44059884286070117
2002	0.3549123012725095
2003	0.3660023208967736
2004	0.4247135171791424
2005	0.29868261635547944
2006	0.17306488331409609
2007	0.1951536031961942
2008	0.18400344597793872
2009	0.13370909835286549
2010	0.17369268179682876
2011	0.21304905134549462
2012	0.2827273099320608
2013	0.283360000390183
2014	0.22075141330231035
2015	0.40199217773849466
2016	0.225325717187477
2017	0.15593553446775102
2018	0.1628108312782183
2019	0.22601310302143557
2020	0.38787283026942476