Year	% of total merchandise exports
1960	1.543631328191871
1961	1.5055729085636098
1962	1.1651841117563413
1963	0.9611680538011926
1964	0.9987903222354412
1965	1.247792846378658
1966	1.239711303156787
1967	1.5564848908224584
1968	1.763668430335097
1969	1.7779905352592897
1970	1.7868637447831945
1971	2.381168053440767
1972	3.0625396677266576
1973	3.0456724670461304
1974	3.861271937964845
1975	4.413906837367962
1976	3.715536390782243
1977	3.069130123509138
1978	3.3028536313109904
1979	3.4568822218249786
1980	4.084005722980103
1981	4.744266440452566
1982	4.283674715004094
1983	4.0675182597652935
1984	3.397702744302796
1985	3.5115967273312862
1986	3.0841931500612487
1987	2.65055503460895
1988	2.2817792151113268
1989	2.9051574782551484
1990	2.6490395383908583
1991	2.9139191244536096
1992	2.4618189130521504
1993	3.8139974094870106
1994	4.329204064157103
1995	4.022892219472932
1996	4.5676770989304964
1997	4.596075791108765
1998	4.736991820497227
1999	5.772330134648725
2000	3.832937946348378
2001	3.8398102612841725
2002	3.2662397149258853
2003	4.117405259034135
2004	4.472589133667924
2005	4.565737973011076
2006	5.845283908359041
2007	6.203343318401065
2008	6.408171703542156
2009	5.767681212105518
2010	5.5426949234837
2011	5.420643914465472
2012	7.841032728897625
2013	7.869069897890238
2014	8.170354915907382
2015	6.904254893952774
2016	5.615692177533582
2017	5.431068150620605
2018	5.265071747068528
2019	4.614856824162888
2020	4.296186935288512