Year	% of total merchandise exports
1960	8.586863804378732
1961	6.409130816505707
1962	5.159420289855072
1963	3.7582128777923787
1964	2.372644801116539
1965	3.0564629024731684
1966	1.6091417910447763
1967	1.6288951841359773
1968	2.3366606170598914
1969	3.822636329603594
1970	4.367438573150959
1971	5.555218262400583
1972	4.846415313043343
1973	4.597322800087777
1974	3.9184796346044193
1975	3.437621705828898
1976	2.6510495555150237
1977	2.912748473156042
1978	3.0875059990401534
1979	3.306452865955033
1980	3.539421865318157
1981	5.17533379721409
1982	4.0335841829331995
1983	4.979461611263428
1984	5.7414922069537955
1985	6.262376009652136
1986	5.148001983468365
1987	5.582075971371532
1988	7.17822486448827
1989	7.883156589094592
1990	8.126163980881245
1991	9.893080470150677
1992	7.730475047748336
1993	8.93287205909568
1994	8.801796235676749
1995	7.818845501721194
1996	7.1982795833586435
1997	6.47503547668906
1998	4.632770900369187
1999	3.6122144127632247
2000	3.5877581608869904
2001	4.172638029821135
2002	3.8363933369464807
2003	3.467051815171312
2004	3.3474878318822463
2005	3.5544459116942795
2006	3.32875169546717
2007	3.58543010121125
2008	3.9228207049663086
2009	4.878081823555842
2010	4.925108639608671
2011	4.041083425766553
2012	5.662918919259145
2013	4.603632150135222
2014	4.676392693134073
2015	5.320819565742105
2016	5.896427884747949
2017	4.6320232956486285
2018	3.9057909873855037
2019	4.6772084497776225
2020	5.4542081439874535