Year	% of total merchandise exports
1970	60
1971	46.15384615384615
1972	33.33333333333333
1973	30
1974	34.61538461538461
1975	60
1976	64.70588235294117
1977	20.833333333333336
1978	17.829457364341085
1979	19.047619047619047
1980	16.9811320754717
1981	17.261904761904763
1982	11.428571428571429
1983	10.416666666666668
1984	5.158730158730158
1985	4.029304029304029
1986	3.954802259887006
1987	2.912621359223301
1988	31.04746597985397
1989	29.767581837566276
1990	2.7472527478851387
1991	2.2935779813130313
1992	3.91019737897906
1993	3.9749320887600894
1994	5.719927839007726
1995	2.6769635562751195
1996	19.511020112603134
1997	2.062680830221035
1998	1.7252261725240552
1999	1.5062326868527545
2000	2.8453063133131513
2001	4.10252076434698
2002	1.6970901190360501
2003	1.1001396397956158
2004	1.6476382405398935
2005	2.7288076613717287
2006	2.329275739247052
2007	1.4482748971702606
2008	2.0833636480158635
2009	2.2368845711766516
2010	2.8074789471233554
2011	1.1867024504267623
2012	2.348221730040821
2013	3.552384238784269
2014	2.858046638835561
2015	6.892947089978517
2016	10.78754528123249
2017	6.259073228216177
2018	14.255226812935229
2019	7.777951140586451
2020	6.858134243598137