Year	% of total merchandise exports
1963	0.2079542500649857
1964	0.14590020426028597
1965	0.08968609865470852
1966	0.2778371446890361
1970	0.3263530051672559
1972	0.23047722342733187
1973	0.03996802557953637
1974	0.5285641879661139
1975	0.659264399722415
1976	0.07412898443291327
1977	0.8198936841156862
1978	0.16901408450704225
1980	0.006605892456070815
1989	0.39573026047684484
1990	0.6458624095286287
1991	0.38733528724226834
1992	0.5399308379438819
1993	0.36297829207466414
1994	0.5705145406080758
1995	0.21881928115871663
1996	0.2358828679667888
1997	0.1793631726312888
1998	0.13271532379715492
1999	0.02889939661152453
2000	6.629111022993247
2001	6.608288977373639
2002	6.626344353597117
2003	6.6379972087824575
2004	6.638043340031288
2005	6.638457711933171
2006	6.638497008903005
2007	6.638576721041116
2008	6.638614308933706
2009	6.638588347998795
2010	6.638579368873552
2011	6.638627214090577
2012	6.6385793684503955
2013	6.63863682226545
2014	6.638623363933513
2015	6.638575212113864
2016	6.637818977320908
2017	8.69782944521418
2018	7.002765926379956
2019	6.776883739686274
2020	5.231860827863163