Year	% of total merchandise exports
1960	9.306318681318682
1961	14.94805194805195
1962	17.106051527860995
1963	13.767264178665883
1964	12.165210036650691
1965	9.211474700879343
1966	5.39193475305845
1967	4.724048310655863
1968	7.697456492637215
1969	7.5943396226415105
1970	5.615335925490551
1971	4.718590108015918
1972	2.2064217594943853
1973	1.155672163918041
1974	1.4101200016161834
1975	1.4826600582926177
1976	1.3420855564916223
1977	1.4004775822169773
1978	2.046758511698217
1979	1.7248130436178066
1980	1.2707668861420247
1981	2.2427268871034802
1982	1.7759764515364211
1983	1.795200845466469
1984	1.7856816645658646
1985	2.4921783444968875
1986	3.0527495678478824
1987	3.6687100135640978
1988	4.9173052609851124
1989	5.501393546450595
1990	5.9188836791185775
1991	7.354563976031783
1992	7.850440978634166
1993	7.794397871790116
1994	7.9420796252417745
1995	9.855557840434402
1996	10.398115739505142
1997	11.000965171110662
1998	11.195442045776367
1999	11.070441424500377
2000	11.486295571473693
2001	11.345909981782103
2002	13.17129833515638
2003	15.086984049482119
2004	16.317271071172303
2005	17.22435796390545
2006	17.855663052156988
2007	18.907443063586353
2008	19.08675126625749
2009	22.43711555620478
2010	22.594891609149506
2011	23.15942896013209
2012	24.62527546728972
2013	25.722498235571233
2014	23.243915137952943
2015	24.22364097065688
2016	24.58284386463616
2017	29.59016516129797
2018	30.583415133895997
2019	33.842306654045586
2020	35.296945017622164