Year	% of total merchandise exports
1981	63.8469768697563
1982	61.259817844391925
1983	49.930350296750824
1984	48.45918445146084
1985	38.319214719455786
1986	38.11241639280122
1987	27.832591344452247
1988	14.720161696867553
1989	2.689808364036313
1990	7.658051469132072
1991	8.347264671632253
1992	13.020371837267803
1993	4.901038024084815
1994	4.061023431225428
1995	9.235696179000378
1996	20.577617328519857
1997	25.371630133534893
1998	36.24887285843102
1999	29.634340607509067
2000	42.844948405346926
2001	47.71793018268832
2002	60.10369725727761
2003	53.953457263016105
2004	58.39689010032715
2005	67.17732206118721
2006	68.2470064520024
2007	72.28135303357573
2008	70.64211380653595
2009	69.91448164383824
2010	73.02076388604667
2011	69.66806451028414
2012	73.31571880820908
2013	69.08492741406847
2014	67.21049674901381
2015	64.20223204409976
2016	54.899690240935364
2017	56.808129760006466
2018	57.72939208490514
2019	67.80128528178052
2020	71.41006779846323