Year	% of total merchandise exports
1964	12.601591239627
1965	10.545509800942106
1966	8.324011318023295
1967	8.049645390070923
1968	6.4363277393879565
1969	5.728820005705049
1970	5.576759966072943
1971	4.642477520181562
1972	3.8529011885443625
1973	3.7755088869670725
1974	3.8544760831711566
1975	3.423452408481716
1976	3.1614823496753695
1977	3.7482297189338367
1978	3.7044872184745734
1979	3.794761977020352
1980	3.594479080892444
1981	4.860026846585892
1982	5.411453203107178
1983	6.797973058422841
1984	7.356166829686921
1985	9.233394954802836
1986	8.8014387491206
1987	8.95908840114795
1988	8.708150091575833
1989	10.151437165579527
1990	10.577202151779137
1991	9.615600985923995
1992	7.914016146712228
1993	8.738628796606998
1994	8.867577149920692
1995	9.738029449457054
1996	9.83410615615396
1997	10.776769586928816
1998	12.525735941422713
1999	10.47215453458461
2000	13.177998956399255
2001	13.178295489211456
2002	13.166137115924014
2003	13.182999439611812
2004	13.15661826856201
2005	13.16005068885995
2006	13.156711988097102
2007	13.154236617572218
2008	13.154432779846195
2009	13.153983349799608
2010	13.153985583180544
2011	13.153550740067912
2012	13.330846150268219
2013	13.330837274738041
2014	13.33078272820675
2015	13.330781645626544
2016	13.330823720498156
2017	16.827878231530224
2018	14.222339353119807
2019	14.526457591923739
2020	17.66732292298127