Year	% of total merchandise exports
1960	20.817730998886752
1961	18.879392212725545
1962	23.91875963369299
1963	22.379874651810585
1964	17.440868553702984
1965	20.934146854618135
1966	19.422118897376286
1967	21.589723526343242
1968	19.506973330070956
1969	18.18671445182139
1970	15.992889351370101
1971	14.51047097099857
1972	15.690086935276993
1973	15.10360766187473
1974	17.218605358105737
1975	23.619008455440177
1976	23.97969520823877
1977	23.45119990192639
1978	21.591261866248388
1979	16.817651542532825
1980	20.428121901684353
1981	27.631990270682294
1982	29.157962932225995
1983	29.410474095597806
1984	21.72120566449836
1985	24.559093919394147
1986	23.427804560419908
1987	18.86785004736987
1988	18.033598371105956
1989	17.71293054148188
1990	15.663563499483288
1991	8.353932049065035
1992	3.3285445811743823
1993	2.568886855013861
1994	2.3719109722024654
1995	4.006571263492741
1996	3.454404098981365
1997	3.095722192855619
1998	3.2930801946787285
1999	1.1747021235383923
2000	0.9917223085671975
2001	0.8677122560698249
2002	0.14930979510685374
2003	0.11951796456542063
2004	0.09631906824580248
2005	0.17053115576215758
2006	0.21121626767541482
2007	0.1737048924095497
2008	0.1621563310820846
2009	0.23028742788587386
2010	0.8883017554364359
2011	2.076701242781729
2012	0.6503019093865678
2013	0.5830962358675251
2014	0.5117583665024392
2015	0.4779200262264912
2016	0.4432358467187946
2017	0.4917391377983138
2018	1.26673362128415
2019	1.8098377597821265
2020	0.31428675302771164