Year	% of total merchandise exports
1975	82.35434290480163
1976	79.66788804864738
1977	68.99017439168682
1978	71.33938433462997
1979	73.31324974217011
1980	81.32857468704297
1981	94.33144981189767
1982	92.90694254623463
1983	87.18190537084399
1984	82.87621278758813
1985	87.89982151457632
1986	68.03593179049938
1987	75.75734740015072
1988	65.11599853315955
1989	72.35717133047223
1990	82.23671491566246
1991	84.37239004954222
1992	86.56206304139839
1993	87.63322517343593
1994	83.13749556458927
1995	82.55703110506623
1996	83.07054808330885
1997	81.13924324749483
1998	56.866783385856934
1999	60.32645362437857
2000	43.802999197547976
2001	52.24774205881085
2002	37.678099100759546
2003	23.52866633923948
2004	27.562817164364695
2005	37.471687427212586
2006	34.660545549596385
2007	26.803592360545853
2008	29.527975994210152
2009	35.53342778609436
2010	29.406743792047223
2011	36.95980189399848
2012	44.25409257025767
2013	43.61836900501784
2014	31.641084715186
2015	25.81802017724274
2016	22.634570740622685
2017	21.63323363462027
2018	19.273530387997564
2019	21.89593539261149
2020	25.496399940760767