Year	% of total merchandise exports
1972	3.76876762441887
1973	1.0754193855546532
1974	4.128294696729121
1975	0.6389483338428614
1976	4.315468757804306
1977	4.655627043560806
1978	6.472605408775621
1979	4.854738895832698
1980	6.698558538036119
1981	4.79812977822708
1982	6.892690675207666
1983	4.763548021974988
1984	3.209009705402387
1985	3.3056692929151357
1986	3.457042895231238
1987	3.165861812778603
1988	3.3482298451743824
1989	3.4965183665855166
1990	2.5602845080840573
1991	2.4019096398937103
1992	3.296699504012388
1993	3.2847059434292745
1994	3.0319226055858532
1995	1.4740289405289935
1996	1.7443096817962702
1997	2.835690880167562
1998	1.7653245947675353
1999	1.1188367984515284
2000	1.3840291343404894
2001	0.8947253548388696
2002	0.9368970199276436
2003	1.0115016515718178
2004	1.2260295824494716
2005	1.5790370405470526
2006	1.7145801963155707
2007	1.5716336829005066
2008	1.8639076489847417
2009	1.7769859125545475
2010	2.431106538691612
2011	2.1400838118973344
2012	2.3995623383874345
2013	2.597442273536325
2014	3.4006395692213407
2015	3.1759350499921193
2016	3.484049656781162
2017	3.331918626403876
2018	2.731629796251287
2019	2.9034767736192375
2020	2.85786298824144