Year	% of total merchandise exports
1970	82.28892488357967
1971	85.36769921967368
1972	99.72739073993942
1973	98.60576485921257
1974	91.93035193193406
1975	99.98546642397902
1976	99.97941062926265
1977	99.43548387096774
1978	99.22574929087628
1979	95.52311862465771
1980	92.6021833106664
1981	94.2202959063266
1982	90.92574499267221
1983	90.92574500228679
1984	90.92574500844765
1985	90.92574498887703
1986	87.48606413629562
1987	87.71643833836389
1988	91.2007381820233
1989	89.36756050381696
1990	85.1473138102524
1991	85.16621609629686
1992	81.57442682810576
1993	77.64496627009251
1994	77.08692709571412
1995	70.06247888333975
1996	64.29032935448947
1997	53.44608507324163
1998	56.913598882307014
1999	61.01369715854109
2000	51.810112379431914
2001	61.815651121882254
2002	62.47951020166084
2003	56.22322076426818
2004	51.87326083035848
2005	55.18501718002638
2006	51.31946154786795
2007	46.30874923953658
2008	47.26675624918697
2009	51.983841767697214
2010	46.17566488777388
2011	42.42533141818461
2012	46.40240805823493
2013	42.345598739246824
2014	39.19557200454608
2015	40.001493092120874
2016	38.7209691117546
2017	37.475398503031705
2018	33.59938904116228
2019	39.36462731674984
2020	39.3646272975609