Year	% of total merchandise exports
1960	5.255358560465732
1961	3.559569126103507
1962	4.3112699740580185
1963	4.141593347359053
1964	3.572852171467664
1965	5.38718322877473
1966	6.206027594518662
1967	2.988546920024561
1968	2.37639064645335
1969	1.9654598271954613
1970	0.9996295998859299
1971	1.2489941553292008
1972	1.6491476753690475
1973	0.7320423442189937
1974	0.9518261398661354
1975	1.4469297275750737
1976	0.9145011765785014
1977	1.721023901072585
1978	1.6613107950262522
1979	1.4317020120186743
1980	1.2964860841673045
1981	1.744893852759363
1982	1.6244216389142307
1983	1.7884037508228776
1984	2.2411953601435317
1985	1.946051411780715
1986	2.0988769504350713
1987	1.9425773338411008
1988	2.0271362447250145
1989	1.6728018186928928
1990	1.5893383134419095
1991	1.4491879910232586
1992	1.417132013053434
1993	1.5090881624962402
1994	1.6347998522636833
1995	1.795576616608616
1996	1.734166611704247
1997	1.7169211402219116
1998	1.9786037927031677
1999	1.9445477108109792
2000	1.8654994471122555
2001	1.851183781709776
2002	1.988480491494151
2003	2.0830168273789442
2004	2.2221693610377216
2005	2.4939786458538173
2006	2.7578291921305693
2007	3.1641459451747256
2008	3.4352229742918468
2009	3.7960575157833283
2010	3.973185529524333
2011	4.188503293477814
2012	3.9356516636676697
2013	3.7811478987313145
2014	3.9771452404064997
2015	4.326871277949622
2016	4.615994456609894
2017	4.807310165951332
2018	4.8302721644572175
2019	4.650288859745627
2020	3.9850141432510413