Year	% of total merchandise exports
1960	0.7902076231794236
1961	2.014846235418876
1962	2.9850746268656714
1963	2.6183412872436476
1964	2.670481640438722
1965	3.526476924821408
1966	4.407831389750722
1967	5.765312237804148
1968	5.203816131830009
1969	6.345878989995235
1970	6.505609844372059
1971	4.921349781345865
1981	9.139202827502539
1982	4.27921944541916
1983	1.9273181707561637
1984	3.38690878990604
1985	3.1600108723221894
1986	4.630175077049358
1987	5.38939773520576
1988	5.492730686353093
1989	6.322854030118388
1990	5.926826414226515
1991	55.61248431558518
1992	67.14288862635911
1993	85.46568694161498
1994	98.87565776485901
1995	96.72582467701315
1996	91.45558083259941
1997	20.226233387334904
1998	5.93348305321974
1999	4.079862375865463
2000	7.130042412833347
2001	9.41338322381744
2002	10.433326814730687
2003	8.45932513382145
2004	3.294382362023322
2005	0.8070560920609963
2006	0.24059368154632255
2007	2.612627978430675
2008	3.7657611279082848
2009	2.9827822420844154
2010	2.142158354816899
2011	1.9863798520735672
2012	2.2673969548300725
2013	2.3092110281387206
2014	1.847897634856082
2015	2.0453627710711486
2016	0.9754248155557893
2017	1.4066541118057592
2018	1.0083761432445044
2019	0.26216315881219343
2020	0.7064317163657255