Year	% of total merchandise exports
1960	0.2690802348336595
1961	0.6298551333193365
1962	0.45644731837200464
1963	0.6885001860811314
1964	1.3489208633093526
1965	0.9436788496105452
1966	0.666231221423906
1967	0.9560723514211886
1968	1.3895321908290876
1969	0.6382683502150687
1970	0.8808596732325548
1971	3.5173686860211446
1972	5.8799272542716965
1973	5.4865001093686105
1974	5.556030429951278
1975	5.52823431364452
1976	4.653450588761365
1977	3.5767889717597616
1978	3.4570337203713537
1979	0.8206534752606718
1980	3.6324666234078102
1981	4.235933356127041
1982	3.98804955596974
1983	1.931038228892243
1984	0.3090969767464465
1985	3.9593230802265342
1986	5.74485925334398
1987	5.405031900436855
1988	7.064887923564131
1989	2.617746713303513
1990	4.2093086076463235
1991	7.582204378285976
1992	10.401451055574052
1993	7.6040414419537
1994	11.02745803546209
1995	11.46857300108171
1996	13.450710986456766
1997	12.839791562948374
1998	7.774513051264706
1999	8.434112632703727
2000	11.490848327531262
2001	10.73881747405658
2002	11.051553704301188
2003	10.41700629081982
2004	12.952950278529944
2005	13.580948778035665
2006	12.791217008953499
2007	14.20355231432729
2008	15.536289600013406
2009	17.917721624661535
2010	19.482670692732317
2011	19.280149879082064
2012	20.802790105881968
2013	21.875294507443183
2014	22.170053913646594
2015	26.7953615625391
2016	28.106141893211458
2017	33.656483777462206
2018	35.813077243573524
2019	35.89958505910006
2020	35.40377573640432