Year	% of total merchandise exports
1960	5.432887855897734
1961	4.08316633266533
1962	7.00703308153165
1963	4.048478597215059
1964	3.5800043658589824
1965	3.768588307190874
1966	2.901073397156948
1967	2.049780380673499
1968	2.0779220779220777
1969	2.7221402632773493
1970	2.632653923626273
1971	4.581324245610219
1972	4.550471649986551
1973	2.963579338155284
1974	1.8708897584560857
1975	1.4512832159890985
1976	1.038150693221091
1977	1.1822218647855285
1978	2.6902060718923817
1979	2.9845843048777034
1980	5.412737173657818
1981	6.063029778610179
1982	4.236898239156803
1983	2.7072048075004047
1984	2.721521720355817
1985	2.8796785997738397
1986	2.183942291198324
1987	1.8114058270535223
1988	2.142145143502883
1989	3.5155690039381446
1990	2.7025788162852074
1991	4.201173379813109
1992	3.2781333362766083
1993	4.226840133160503
1994	4.53102548654638
1995	7.475480327964461
1996	5.613858042346858
1997	4.318854257865488
1998	4.754015563190418
1999	1.6391154960677377
2000	0.5347544583583012
2001	0.18328233533888433
2002	1.1921819568748973
2003	0.26792088916206414
2004	0.2964122019827284
2005	0.3729192816034567
2006	0.3151559853248673
2007	0.5297378015806988
2008	0.7292457173070145
2009	0.5900997116543011
2010	0.5716003646029965
2011	0.6239036051622981
2012	0.5674424622286732
2013	0.5823848211302057
2014	0.5316595286944525
2015	0.5328562973158981
2016	0.38057997726443427
2017	0.3946610867860549
2018	0.40626017788809377
2019	0.41711536821942374
2020	0.33182920970444185