Year	% of total merchandise exports
1960	2.952659834065398
1961	4.196588868940754
1962	5.223263166795284
1963	6.3842517880249305
1964	6.8944166671977545
1965	7.060515389789622
1966	5.768817131636414
1967	6.03006884498885
1968	4.9476357912985405
1969	8.40228307474631
1970	8.977064592991118
1971	6.523773315768223
1972	11.4858419396597
1973	12.326440315641712
1974	11.853082960696689
1975	4.091159310592095
1976	2.687441215497744
1977	3.032027661831043
1978	3.7968549526702775
1979	3.938714964905764
1980	4.209774835145349
1981	4.314696436882851
1982	5.10782591183582
1983	3.870262324879091
1984	3.678262839185462
1985	3.5186196068664852
1986	3.23186850649957
1987	4.399667856372429
1988	3.3394637918759185
1989	2.8626590783379635
1990	2.906600861988133
1991	3.810064891841789
1992	4.3385094505125865
1993	4.653628040467034
1994	5.07537358853135
1995	4.586755911313509
1996	4.590395180961896
1997	4.057510744519071
1998	5.745282799329061
1999	5.770147598434495
2000	11.081147858314415
2001	10.53571139035912
2002	9.78237659418898
2003	9.89421494987099
2004	11.350988166092737
2005	13.362341613647358
2006	12.557386663983344
2007	9.339786357278987
2008	7.735148287289792
2009	9.155241327480008
2010	8.70461362132411
2011	15.55940572800201
2012	18.892737881035675
2013	20.642104262822738
2014	20.524934396671846
2015	21.324586047867587
2016	22.97382278958562
2017	22.975213059765295
2018	22.114427097923492
2019	22.046052472911004
2020	20.997766249712328