Year	% of total merchandise exports
1960	3.087382114652286
1961	3.318768717168246
1962	3.027164147553113
1963	3.0094714329361443
1964	2.9820885647221917
1965	2.9714978775015157
1966	2.9675674542443238
1967	2.6076016551832595
1968	2.783184729373352
1969	2.7978005434851947
1970	2.1482005127826374
1971	2.3271090617821817
1972	2.7666112468761557
1973	3.328666641441305
1974	4.811987264612451
1975	7.779259017369975
1976	8.255406368821292
1977	8.886093589103265
1978	8.72330647883429
1979	9.504398826979472
1980	9.854725818940073
1981	10.68930468930469
1982	11.64494972841789
1983	9.735343543130838
1984	7.475057423876554
1985	6.134636326192075
1986	3.9782339518091723
1987	3.35190411770045
1988	3.0742062803281285
1989	2.645077161029291
1990	2.733157982999069
1991	2.939015908520956
1992	3.4450752229088617
1993	3.0224538102296075
1994	2.3809158432122564
1995	1.917789719710506
1996	2.2327098380770236
1997	2.4090338249352734
1998	3.143344698536079
1999	2.333095320957621
2000	1.9041844540652182
2001	2.4542387803451593
2002	2.683181363829394
2003	2.653196144864764
2004	2.5056283415985945
2005	2.718552960300157
2006	2.9633138426525747
2007	3.6497710444413642
2008	4.355249760053398
2009	3.743132672084089
2010	3.214184758753555
2011	2.822830003258105
2012	3.6781012460243923
2013	3.723567612539934
2014	4.234144200268613
2015	4.284210549118839
2016	3.581698161514452
2017	2.8083922422153558
2018	2.8186494664207573
2019	3.0455231364223847
2020	2.658182217350631