Year	% of total merchandise exports
1960	0.3289782874330294
1961	0.3940074220002749
1962	0.6033789219629927
1963	0.5600422060792988
1964	0.387170241032454
1965	0.43350422195416166
1966	0.729369534501852
1967	0.5104180938225211
1968	0.5305652392381084
1969	0.9494836740551041
1970	0.7457293875529298
1971	0.9631464075095526
1972	1.078370659538498
1973	0.767305314756061
1974	0.5670856531823188
1975	0.6990025876891849
1976	0.8354220013905612
1977	0.558688167417994
1978	0.6132785423130579
1979	0.4207015635099068
1980	0.47239223489914617
1981	0.6071701788766541
1982	0.5373626776273587
1983	0.5620152200776805
1984	0.6266181963871875
1985	0.913632363611135
1986	0.7861110290929048
1987	0.7318968850237793
1988	0.6303567560804145
1989	0.5306848428480515
1990	0.8651217063161816
1991	0.615014425931732
1992	2.122490865458159
1993	4.776683092071389
1994	2.831668128743171
1995	3.8117052078534726
1996	3.0684096684322535
1997	3.398426733958123
1998	2.8554609542101557
1999	2.674073418540667
2000	2.784786615564089
2001	2.458604713525815
2002	2.374357069740419
2003	2.4635066902809637
2004	2.317230254156935
2005	2.2746325012701356
2006	2.3372749240126898
2007	2.3828016357104174
2008	2.234384964647659
2009	2.086114999670947
2010	2.612903254156795
2011	2.5260194266052767
2012	2.590338253747066
2013	2.6878967212786384
2014	3.092951913937676
2015	2.7622979533007177
2016	2.8904652064024328
2017	2.898830574249177
2018	2.841904583051189
2019	2.9653341118522016
2020	2.998101542876982