Year	% of total merchandise exports
1960	0.025490695895997964
1967	0.06913716814159292
1968	0.012039489525644112
1972	0.019518898197234562
1980	6.401536368728495E-05
1981	2.2546613608142594
1982	0.07223846885816163
1984	0.1152848372359555
1989	0.08494043503128947
1990	0.07815538751682966
1991	0.011443310713750807
1992	0.015695708696266665
1993	0.07779298037412909
1994	0.3248931416517337
1995	0.059137999415125084
1996	0.06616696671848425
1997	0.03461306642892878
1998	0.006324086127189687
1999	0.1320386768498541
2000	0.21042028525439013
2001	0.098651974423732
2002	0.3530689197075212
2003	0.08272495465669893
2004	0.12070394300929092
2005	0.5988170282247149
2006	1.1859388218331983
2007	2.6268990272398582
2008	1.4847457666108628
2009	1.125134545524108
2010	2.7637998550283207
2011	3.0470613587523707
2012	1.4863582365693442
2013	1.237453176846005
2014	1.0557616529383689
2015	0.8792903041034097
2016	1.7089377155160024
2017	2.491745411868791
2018	4.044069844740602
2019	2.3883716564593325
2020	2.3883716515147797