Year	% of total merchandise exports
1960	4.27892234548336
1961	5.966587112171838
1962	13.98701646833953
1963	16.045548654244307
1964	19.33649289099526
1965	20.596458527493013
1966	19.606087735004476
1967	23.095051060487037
1968	15.349444807315479
1969	17.23431697706721
1970	13.295348971051313
1971	17.079917454383512
1972	13.7575601226818
1973	15.117682424458348
1974	15.90733020990888
1975	14.200221199832333
1977	10.81393275499841
1981	12.306864078870658
1982	16.258799736415874
1983	9.023597643130751
1984	5.157008323813398
1985	1.370141269295061
1986	5.031660268409549
1987	3.473607500738611
1988	1.8308530831389942
1989	5.101601709824241
1990	2.9599818394688184
1991	18.86443666385168
1992	19.731237825252265
1993	17.72076839264039
1994	29.152004572159885
1995	30.073151840270807
1996	26.460310860661174
1997	30.3651116718281
1998	44.42174090723335
1999	45.09225092250922
2000	36.02219059433929
2001	22.553449740269325
2002	25.54098036116384
2003	24.771749366504405
2004	19.221847153243257
2005	22.433665808251522
2006	20.17487234405338
2007	22.54742590113525
2008	13.684217425303915
2009	28.339463314500897
2010	26.264815922714607
2011	22.887848381888737
2012	24.23339941683539
2013	28.335260995853538
2014	25.132931940744673
2015	25.335777817524985
2016	26.285272969739776
2017	21.913075267142958
2018	20.85621840825773
2019	23.52265317431927
2020	24.173832075306674