Year	% of total merchandise exports
1960	12.73682534628244
1962	13.140174213875333
1963	9.845884649034256
1968	1.241982140611244
1969	1.5406967358667227
1970	1.5687459030089588
1971	1.2607169474265103
1972	1.6592208598195668
1973	1.908413612422564
1974	1.6987171797833291
1975	2.3164352635111523
1976	1.8777452581390826
1977	3.00851603551368
1978	5.051830391121805
1979	4.704529326840727
1980	5.568448927370645
1981	5.629915637378795
1982	5.626706670644118
1983	4.945942745762403
1984	5.727060405856106
1985	5.713627778186483
1986	4.825654018591715
1987	4.321205936030868
1988	4.069364900706928
1989	4.166874506908574
1990	4.219200776710946
1991	3.4988158897260986
1992	3.2739928961126727
1993	2.7934634953298443
1994	2.6054130429376343
1995	2.835768237710882
1996	2.9574622882035713
1997	3.003187037080453
1998	3.7679172055406447
1999	3.6274549185910727
2000	3.406234092983498
2001	3.7208300863526667
2002	3.464202820658207
2003	3.058068778619755
2004	3.175641158590286
2005	3.5534194149295346
2006	3.870644008994775
2007	4.313611590366761
2008	4.66567405182425
2009	4.635539010203779
2010	5.052349573389495
2011	4.875113550817394
2012	3.8688367281637994
2013	4.159699357066086
2014	4.319948046038674
2015	4.484546766705544
2016	4.452822297082854
2017	4.661110485814033
2018	4.58045569417337
2019	4.395975673282177
2020	3.8087400998301426