Year	% of total merchandise exports
1960	77.30407523510972
1961	78.1556195965418
1962	84.24783407718562
1963	83.06605055721663
1964	82.13677293745437
1965	77.21268163804491
1966	78.6384019567876
1967	80.55502392344498
1968	75.55958862673926
1969	76.52667846168171
1970	75.48641438257235
1971	74.96416061954096
1972	73.95646520803444
1973	72.92331297663537
1974	70.13760150395572
1975	72.65251345601988
1976	77.00289772263488
1977	74.96961847653063
1978	72.43074583426197
1979	68.40346030565443
1980	67.3345276582309
1981	54.55306316724273
1982	53.808005791008625
1983	57.15559246278408
1984	59.415507036290386
1985	60.32292357802038
1986	64.81574373115592
1987	69.24288895834961
1988	64.55523771762492
1989	68.49405810218387
1990	72.812515759946
1991	74.46307245095916
1992	74.59036896647333
1993	70.81999154805764
1994	70.7666454775003
1995	72.06028688442242
1996	69.00106713177125
1997	69.36400845158023
1998	72.65658759694605
1999	76.22524596807357
2000	76.856578108662
2001	74.79269061495756
2002	75.06060336473563
2003	74.02732150860629
2004	73.52359491413388
2005	71.01800052714763
2006	70.70627259846127
2007	69.1162909685655
2008	65.6485644428791
2009	61.40127886394564
2010	60.681430468112005
2011	60.38309901265316
2012	55.85273205388884
2013	56.02755542076158
2014	58.86679876940632
2015	63.31976666026414
2016	65.22452641728141
2017	65.94903341925287
2018	65.78145745023114
2019	64.30778337748087
2020	64.03800922316934