Year	% of total merchandise exports
1981	22.827346465873536
1982	13.575525805384158
1983	15.881467239133967
1984	22.076782166633688
1985	19.889694706214446
1986	19.249419339065238
1987	16.595163806552264
1988	10.070438310476144
1989	13.236576693427555
1990	13.986872912908302
1991	19.228539872242127
1992	25.89537933817595
1993	30.573500009817632
1994	24.90512066378557
1995	22.62407728542407
1996	18.5282234952743
1997	16.08546712438
1998	17.348268960643583
1999	19.56671055365605
2000	18.133947317053497
2001	22.224092122534962
2002	15.494381335477048
2003	13.918671687865366
2004	12.684563251472488
2005	17.537190975642805
2006	14.324785031555065
2007	16.530724165291847
2008	10.933489599143478
2009	19.542884117440508
2010	23.336832742811982
2011	13.373406305676609
2012	8.97317676263954
2013	7.183916195784803
2014	8.035418026567108
2015	14.134380101026547
2016	11.50786783711862
2017	5.531243641028501
2018	6.1393512602937275
2019	7.069648439119865
2020	6.380901238769246