Year	% of total merchandise exports
1960	10.790487827803364
1961	12.278370825124846
1962	13.533565745955126
1963	13.940180999147762
1964	16.208009109888025
1965	18.06016284680338
1966	19.089624622904495
1967	17.348650481424045
1968	19.171749516336035
1969	19.35646221520664
1970	19.45017689842618
1971	20.66490309750286
1972	21.32668072441842
1973	19.004296189210393
1974	18.04514999474137
1975	15.767566923749396
1976	12.939449541284404
1977	16.09929347470578
1978	14.06418387414215
1979	15.320595907324504
1980	19.672655257656324
1981	21.71431957943272
1982	21.535805057444797
1983	16.967701634055857
1984	17.635038761874334
1985	18.860949379875198
1986	16.865469653001178
1987	14.34773084248627
1988	15.255235823575614
1989	5.854337740725051
1990	19.66576379232311
1991	13.224755427246034
1992	8.755667059645877
1993	6.5674125742024385
1994	6.170910555076231
1995	7.328842507479645
1996	5.46657487109354
1997	2.006831555254619
1998	1.234313959574309
1999	2.2386129881623993
2000	3.970681998549905
2001	5.366329514296621
2002	2.675851847604689
2003	1.8695339154365604
2004	1.5699190570533692
2005	1.531831089274647
2006	1.5881242819912298
2007	1.6631473582447716
2008	2.7981023156414873
2009	3.8863260209323105
2010	2.6205741981858095
2011	5.4984119225118935
2012	2.820076799612556
2013	4.627856847514944
2014	2.1946295849365076
2015	2.3860771937985215
2016	2.4449464770326235
2017	2.204373302388693
2018	2.300152592527008
2019	2.2952783678249236
2020	1.7929722088750981