Year	% of total merchandise exports
1972	0.4572822193430378
1973	7.194667712213292
1974	1.9371228961575102
1975	2.6383369000305716
1976	4.777483642175715
1977	8.566606898006539
1978	11.148780297716469
1979	8.012986617077706
1980	8.808231140134401
1981	8.447589562140646
1982	8.326172434445226
1983	9.002567429533721
1984	11.723782530275702
1985	7.788645396389993
1986	6.2222272221034745
1987	4.210624071322437
1988	5.077722615073617
1989	3.9162041257229823
1990	3.670052724344941
1991	4.748915193130038
1992	2.269732540178231
1993	2.381945829006213
1994	2.461581637435379
1995	2.7013005159741814
1996	1.9996256485555122
1997	2.5225226424536773
1998	2.9366981382886514
1999	1.934625603604745
2000	1.6743734905708616
2001	1.7026666099766596
2002	1.4407464943664294
2003	1.8050847863045358
2004	1.6677020555603064
2005	2.2051876672843775
2006	1.9574370513355839
2007	2.336842337373918
2008	3.0809500264194565
2009	2.5884764830557394
2010	2.558431009132331
2011	2.8048564330880312
2012	2.8468634163222393
2013	2.207915584757427
2014	1.8734767263636578
2015	2.222488694050989
2016	2.5154137232269185
2017	2.1981817818615665
2018	3.030378234414516
2019	3.0672127170598396
2020	3.2006546007831247