Year	% of total merchandise exports
1964	9.966635298143554
1965	9.162741224737882
1966	10.870566559189314
1967	9.775413711583925
1968	12.077986179664363
1969	8.12494057240658
1970	11.921119592875318
1971	11.502772271538971
1972	12.174904609446955
1973	13.319479044312214
1974	11.07657738400082
1975	10.265665269133965
1976	8.974754406797958
1977	9.39746895199361
1978	9.755581587833817
1979	9.248123249204204
1980	9.598184527310512
1981	11.59710692712565
1982	16.419756505044354
1983	22.827949814880228
1984	21.72176040553398
1985	22.355492801933067
1986	12.649993559318675
1987	13.075565434934353
1988	14.605517340825717
1989	12.503296439531258
1990	16.49741066995425
1991	16.489274682145805
1992	17.117963941113423
1993	18.0268498801263
1994	17.848510487136693
1995	18.18201556786483
1996	19.41918947487613
1997	18.51199308907694
1998	20.66260911804196
1999	22.824457635048564
2000	40.0535487504535
2001	40.05920799764613
2002	40.109852009625804
2003	40.019399204686664
2004	40.10534061252489
2005	40.09534918407391
2006	40.10474713797964
2007	40.11605885696174
2008	40.11472286268894
2009	40.12095677742567
2010	40.117426323883976
2011	40.11881968687505
2012	40.24252218023652
2013	40.24221306545671
2014	40.24232929739983
2015	40.24251463010809
2016	40.24217070572183
2017	39.4607849686876
2018	39.9382370497009
2019	47.24703792049401
2020	48.339666441839036