Year	% of total merchandise exports
1962	0.15923566878980894
1964	0.044702726866338846
1966	0.7575757575757576
1967	0.07830853563038372
1968	0.45620437956204374
1969	1.3567820108633724
1971	1.6917171455411228
1972	1.5962983443385486
1973	0.5011839897004391
1974	3.0046933715871704
1976	2.5727295856114063
1977	0.0740018328930796
1978	1.157616416987867
1979	1.0228213314414096
1980	1.1411003329815583
1981	2.5096217859200265
1982	2.5096217858434358
1983	2.5096217859827306
1984	2.5096217863097308
1985	2.5096217863105585
1986	2.5096217858869974
1987	2.5096217854262
1988	2.5096217861278522
1989	2.509621786264294
1990	1.0937527023696996
1991	0.8361734339195366
1992	0.4316750830128233
1993	0.36314289461319493
1994	0.9585274293095538
1995	1.1078416061000318
1996	1.07161874933776
1997	1.258225743261762
1998	1.8932680904380363
1999	1.1698000065955447
2000	0.4482358411803734
2001	0.5916545574044483
2002	0.7587953029123113
2003	0.5758116684798824
2004	0.48879267560587597
2005	0.6862927853801063
2006	0.749845914955422
2007	1.0029484659539114
2008	0.9956717834300551
2009	1.2180859401826472
2010	1.6611986247102857
2011	0.8886918638880634
2012	1.3444604582978918
2013	0.8124772791553724
2014	0.7536524281015285
2015	1.2007506680333864
2016	0.9737371832302104
2017	0.9301681323172735
2018	0.842845526257174
2019	0.9731892972872407
2020	0.9959501255503265