Year	% of total merchandise exports
1960	4.387475530870682
1961	4.055170309477767
1962	3.6363517701843504
1963	3.483336510296505
1964	3.21964122822572
1965	3.110451838908513
1966	3.049234498184389
1967	2.7271379870427137
1968	2.765225742386546
1969	2.7968096090708565
1970	2.5419994337878475
1971	2.630003511179509
1972	2.73925004228758
1973	2.8750756307062244
1974	4.025125197940056
1975	5.738878467558721
1976	6.168307544901551
1977	6.764299448422387
1978	6.626311124854752
1979	6.685295678777879
1980	7.021588511823559
1981	8.33862307163422
1982	8.767693131345824
1983	7.773339027787703
1984	6.42725079819641
1985	5.418774366315049
1986	4.19098881936205
1987	3.541807690511662
1988	3.3781746750425534
1989	3.255696858632261
1990	3.030822250635742
1991	3.1603014901917463
1992	3.2457750953572235
1993	3.2708345530798195
1994	2.8523026070868287
1995	2.6452881648924245
1996	2.7098476430036964
1997	2.752449145934597
1998	2.9029657393644626
1999	2.5786736231884677
2000	2.348456092287809
2001	2.614339956508392
2002	2.6802518235244266
2003	2.657461310297508
2004	2.7132649853250768
2005	2.9623042505152677
2006	3.0004414525198353
2007	3.156500655544063
2008	3.584583535145341
2009	3.8081536095476434
2010	3.5364769586053515
2011	3.3348099573493775
2012	3.782726556933863
2013	3.9973414658808526
2014	4.031692107596635
2015	4.1057364280809105
2016	3.85117994625553
2017	3.475372528769528
2018	3.23418486771054
2019	3.3044891340577296
2020	3.011508679160996