Year	% of total merchandise exports
1960	8.446679015612595
1961	11.180853648659593
1962	10.565777759883328
1963	9.641379119310503
1964	10.264048782396577
1965	7.833985321718617
1966	7.943402280499925
1967	7.278569149756646
1968	7.025181064375401
1969	7.111605062168948
1970	5.608591152026301
1971	5.638183940411297
1972	5.2996279155203965
1973	4.66438046389372
1974	3.860053848255622
1975	4.00501488381366
1976	4.426382503063347
1977	5.1004602330742665
1978	4.800447881852113
1979	4.825381416809541
1980	5.035448527074546
1981	4.752926737474587
1982	5.0991505665158225
1983	4.70146023316326
1984	4.629754311023295
1985	5.189154937508511
1986	4.570217074719706
1987	5.140481335365824
1988	5.2840207606777945
1989	5.43017323846188
1990	5.64555159286672
1991	5.771963778832761
1992	6.035337679619591
1993	6.550736121896046
1994	7.187638278474359
1995	7.892960554467086
1996	8.254019236068716
1997	8.391018313834877
1998	7.876150146302355
1999	8.245702012566975
2000	8.982583375378054
2001	9.215260410873636
2002	9.74798488689161
2003	10.23868628145612
2004	10.402700129421568
2005	10.441877566218224
2006	10.242732413091336
2007	10.533431796208378
2008	11.012112099416107
2009	11.991035244214137
2010	12.583442324978774
2011	13.200547631990911
2012	13.797220445158112
2013	14.532880445983023
2014	14.474914195190362
2015	14.580150094736325
2016	15.095156573078103
2017	16.323633353002023
2018	16.823797412673645
2019	17.78132331883531
2020	17.841254349521023