Year	% of total merchandise exports
1960	4.368969169597679
1961	4.224066103306808
1962	4.028531811533864
1963	3.5481212796565997
1964	3.7667223253273487
1965	3.7776868170821043
1966	2.9505593331222806
1967	2.752383266468148
1968	2.5433716942904474
1969	2.837476592125096
1970	2.470656701532645
1971	2.4351661012215104
1972	1.9390956317508514
1973	1.8950468895934725
1974	1.618910878928943
1975	1.714962062127785
1976	1.5149332067314223
1977	1.5741873764422882
1978	2.191508742011187
1979	1.7640776260092452
1980	2.153506001694054
1981	2.093785604443147
1982	1.7717926413475464
1983	1.5136886309853874
1984	1.3158812252829366
1985	1.685248557446401
1986	1.9927714704320618
1987	2.070626898688618
1988	2.8215365396138954
1989	3.1353383569183317
1990	2.9421918091013537
1991	3.5907448473877364
1992	3.9254224054710565
1993	4.957342512048852
1994	4.987708290377766
1995	5.858431411623231
1996	6.023449940464064
1997	6.856102865484673
1998	6.5047245756120375
1999	6.885020765500591
2000	8.20369120325452
2001	9.032559960484848
2002	9.948300412356504
2003	10.804099039888948
2004	11.20480872750386
2005	12.242450122546867
2006	12.682790244302947
2007	14.377036543376501
2008	14.018821288681425
2009	14.646755198011622
2010	15.635719039141986
2011	15.950324144772448
2012	16.67895861544844
2013	17.46301140162028
2014	17.1734603152857
2015	16.44901992329581
2016	16.87099185771875
2017	19.503990795082547
2018	20.54207332926
2019	20.16523780468523
2020	21.183483686491943