Year	% of total merchandise exports
1981	64.21153996014232
1982	64.96305396576781
1983	67.16964039471729
1984	58.47793664530001
1985	45.88887743108758
1986	48.47464652350663
1987	46.84004969685481
1988	43.047046770162076
1989	43.3556272232692
1990	62.372588427267296
1991	60.70788805884908
1992	59.880355474373715
1993	63.66564560579465
1994	60.542451942944396
1995	49.9308293467463
1996	49.87232953058643
1997	55.70862486371551
1998	61.95966265060241
1999	63.426901019791124
2000	64.27800601930008
2001	69.91534358099352
2002	71.67013270298855
2003	72.03387843850567
2004	71.57599756646746
2005	69.6824515822763
2006	71.27612092474035
2007	69.47827641294968
2008	68.45310129029527
2009	72.4248237759847
2010	69.49971978241308
2011	71.15554997785918
2012	68.86657956652408
2013	68.84615031843772
2014	70.90374726384223
2015	71.6524134588712
2016	71.67510908857281
2017	68.78737492002035
2018	73.21497372726311
2019	72.07446083562657
2020	73.62985740182324