Year	% of total merchandise exports
1960	1.1613705978719424
1961	1.5389876248377312
1962	1.110204768790742
1963	1.1891970787516641
1964	1.3165164923268233
1965	1.4764172566318432
1966	1.2941629467231404
1967	1.398302206676025
1968	1.396246748339813
1969	1.2575488869475901
1970	1.397782888605165
1971	1.5667215418460931
1972	1.2537287130410117
1973	1.9062768923339726
1974	2.8565189244258673
1975	2.882195262283421
1976	2.037735524842249
1977	1.9973674840076376
1978	2.1103100341830103
1979	2.2149720835024302
1980	2.485752049308891
1981	4.968099692771529
1982	5.39778867608655
1983	4.952764568546021
1984	4.929779440032712
1985	4.5746618333157585
1986	4.728405252169985
1987	4.935064422473926
1988	4.397286808746957
1989	3.489241064326066
1990	3.1826705745202846
1991	2.9814550419712758
1992	2.8479642768605093
1993	2.8482654199506663
1994	2.54048683734374
1995	2.5392954948525217
1996	2.447871170478681
1997	2.331918861502243
1998	2.4044682450887365
1999	2.322931402215815
2000	2.0794746802505237
2001	2.4872604662239213
2002	2.7159367693036023
2003	2.717638683884247
2004	2.874409740860915
2005	2.9466906269891227
2006	3.010462147958612
2007	3.4305299668067883
2008	4.010867468585306
2009	4.4371375881600565
2010	4.212690139976892
2011	3.9090954102493276
2012	4.511778295343304
2013	4.51741912971329
2014	4.711462640691974
2015	4.918341878951439
2016	4.854612908776061
2017	4.587885686758565
2018	4.15596982037646
2019	4.5563151663871615
2020	4.555952832391565