Year	% of total merchandise exports
1975	5.498629810556416
1976	12.00982302954705
1977	8.120273676629457
1978	7.261201555971762
1979	8.82592411659339
1980	7.862500167715448
1981	2.5944633462731757
1982	2.97043406051589
1983	7.763746803069053
1984	12.536742767476298
1985	8.377482505595376
1986	28.928136419001216
1987	15.618688771665411
1988	18.340434163400797
1989	17.788955444080436
1990	8.481627595680315
1991	6.870575070418288
1992	7.090341849492468
1993	6.251268476073971
1994	9.144878600723704
1995	11.71488523507122
1996	12.103889356387382
1997	13.07246007021309
1998	31.956369118296635
1999	31.822877236035502
2000	54.81632513753816
2001	47.64764438083483
2002	57.58604677236706
2003	74.89363954893345
2004	69.53485205204333
2005	61.99262074190539
2006	63.3741187308238
2007	70.2537681422503
2008	70.40971188851461
2009	64.34971788246673
2010	70.33653117145585
2011	61.76742368548849
2012	54.25641455719471
2013	55.325881490124495
2014	67.94406989592318
2015	66.66760754310445
2016	72.85614134294988
2017	74.12121014665668
2018	74.91933963932019
2019	73.7249710190563
2020	71.47825675147544