Year	% of total merchandise exports
1960	2.5517409301193084
1961	3.0201822606040363
1962	3.474278312361214
1963	2.9301825993555317
1964	3.0471227911191665
1965	2.7178280754562594
1966	2.9403638946994515
1967	2.3097834696813195
1968	2.2740028815609032
1969	2.254886465412781
1970	1.9065776930409915
1971	2.1475853257397617
1972	2.374905897114178
1973	2.4989955018080967
1974	3.4493705228418112
1975	5.027160035284832
1976	6.18565657443204
1977	6.757095296172991
1978	6.506042527153129
1979	5.9480405349737735
1980	6.075106489885158
1981	7.155145876799944
1982	8.735131165829571
1983	7.957107177219544
1984	6.089872384150313
1985	5.129254954929604
1986	4.295208484725838
1987	3.7716380663863984
1988	3.5206465502383195
1989	3.3592755799816256
1990	2.975380847017006
1991	3.5683416036509574
1992	3.7261719754480502
1993	3.5254618839667575
1994	3.0425003953479743
1995	2.765732280655414
1996	2.962313422049202
1997	2.939955882630931
1998	3.108055286970884
1999	2.620596908191021
2000	2.2114312430146073
2001	2.363773655109394
2002	2.394631124189512
2003	2.248353118022857
2004	2.3665904921461864
2005	3.0427686142332036
2006	3.3957318778387444
2007	3.6717611745177132
2008	4.005607174722333
2009	4.154724621774796
2010	3.807223539910293
2011	3.8002731557255407
2012	4.252419388342605
2013	4.498072226769638
2014	4.406447012428416
2015	4.482705626923307
2016	4.407359796656807
2017	3.911717839299694
2018	3.602896885064654
2019	3.817044977759091
2020	3.189219257743193