Year	% of total merchandise exports
1960	3.3343365949860773
1961	3.147424093816061
1962	3.023433991517845
1963	2.3736564511427614
1964	1.9769743593614588
1965	1.8728407111571463
1966	2.1405862422458672
1967	2.199802255406528
1968	1.4405745132612475
1969	1.7653881956889983
1970	1.9332869045893593
1971	2.9603242912457652
1972	2.755673006490398
1973	2.715215228167129
1974	3.1724269465507673
1975	5.590435519122447
1976	3.7766482549096474
1977	4.187788917033185
1978	4.977118277668581
1979	3.6136613783265243
1980	5.77438159683349
1981	7.151222530069918
1982	7.072745492554729
1983	4.726418607261778
1984	4.528498696428145
1985	4.3461544041177635
1986	3.7481687537752544
1987	3.7086546055544707
1988	3.4575643652299726
1989	3.111729585067756
1990	3.8059670512460584
1991	2.991896245263874
1992	3.7752383481539704
1993	4.575036755970157
1994	4.986032139980199
1995	4.7040794719080345
1996	4.114959415003995
1997	3.9565299298584
1998	4.663274578061458
1999	3.8308463843370237
2000	4.466950732237366
2001	4.474350241284988
2002	4.914627186668117
2003	4.226280398049529
2004	3.0651391823063365
2005	3.4452684948047723
2006	3.6519823008786654
2007	3.453046116510894
2008	3.819576947496614
2009	3.8274717356256547
2010	4.249835589273799
2011	3.9263542772771816
2012	4.468505358557441
2013	4.746970564956951
2014	5.122381717144245
2015	5.3426490976136645
2016	6.172386706275539
2017	6.222783723859758
2018	5.3128079525662475
2019	7.853253614884231
2020	9.63842616915759