Year	% of total merchandise exports
1960	2.4721751718947784
1961	2.6267500082228477
1962	2.035679472375182
1963	2.1211029375868007
1964	2.183092820378879
1965	2.537739336813908
1966	2.2630794706955717
1967	2.360123261734375
1968	2.4694774618252353
1969	2.3819929810480467
1970	2.575129895083468
1971	2.7832606336821524
1972	2.4647206928363623
1973	2.6172172727338365
1974	2.9844570562404598
1975	3.1801779876767142
1976	2.524841472291085
1977	2.532158859886033
1978	2.6776392380698137
1979	2.4912421483217515
1980	2.710310908749045
1981	4.293279650232977
1982	4.796202251882232
1983	4.69322689540103
1984	4.501332039065198
1985	4.288540114697911
1986	4.510569355393186
1987	4.489788250803117
1988	4.261759428968762
1989	3.4933734470212814
1990	3.3170211667090603
1991	3.521655929683066
1992	3.4371642521883343
1993	3.464658429011601
1994	3.119748377205802
1995	3.0383148592276332
1996	2.95425943388167
1997	2.8584648021065475
1998	3.013276758158565
1999	2.918730614460619
2000	2.5840696589158547
2001	3.0968520571949907
2002	3.299486652554881
2003	3.2666569039550795
2004	3.498256119889952
2005	3.5182017383640463
2006	3.59209221998008
2007	4.014680444036503
2008	4.7656613780274615
2009	5.230291196342184
2010	5.020146979537916
2011	4.7157412754214905
2012	5.404389108682415
2013	5.3488276746719485
2014	5.544338200863721
2015	5.680749749663149
2016	5.606400412215189
2017	5.202275865789636
2018	4.794867431503974
2019	5.184293482343082
2020	4.99937246937323