Year	% of total merchandise exports
1964	11.425516163527186
1965	7.566929133858268
1966	5.748356520409724
1967	6.480179194665833
1968	9.03936670945657
1981	17.86589165236798
1982	6.01003882317121
1983	5.087096607169498
1984	3.616122701658473
1985	6.2655910281236835
1986	4.543270963964417
1987	2.4778525875808
1988	2.1001027173405546
1989	3.09074229798945
1990	4.0963480963480965
1991	4.252183698622796
1992	3.1588483994362795
1993	3.360619469026549
1994	3.804672223937429
1995	4.5397603485838784
1996	3.3991335804564335
1997	4.337678447075209
1998	3.9785028205519137
1999	4.5553970518307185
2000	4.163921966922988
2001	3.47376556274993
2002	4.398231341604932
2003	3.856424792078459
2004	4.115430365232097
2005	4.542642342187484
2006	11.099988507310115
2007	14.28281216756853
2008	14.452097029787476
2009	18.390719240170853
2010	14.322324481258628
2011	11.723706684422677
2012	16.705397250245625
2013	16.462960289945602
2014	19.01201715540336
2015	19.76989544045135
2016	20.48500556798619
2017	18.781009967343817
2018	21.532161383081263
2019	16.002301238383343
2020	11.119868725807677