Year	% of total merchandise exports
1964	31.301939058171747
1966	12.628865979381443
1967	13.539651837524177
1968	13.157894736842104
1969	16.999583064852366
1970	14.551141166525783
1971	29.062781824488383
1972	27.93073316020726
1973	26.169362550201814
1974	21.632663333445187
1975	17.409543019593226
1976	12.653184061634764
1977	14.026928262951166
1978	12.639651319963589
1979	10.489002702598189
1980	13.10890001220852
1981	17.255248189467075
1982	14.901350546912767
1983	23.250021728168814
1984	18.744025689293412
1985	18.453767770636798
1986	18.508327038595734
1987	16.194183316993197
1988	20.39460968391522
1989	16.43937473445087
1990	14.882300539806772
1991	10.611297692740266
1992	12.52315336165447
1993	15.602958226345805
1994	15.954535703081408
1995	16.153005724057667
1996	25.665544127795847
1997	20.928583472949423
1998	21.807622244603344
1999	19.380563648066566
2000	21.516785641916037
2001	24.18562401485968
2002	21.650387447537323
2003	29.740114957846757
2004	31.815591542813397
2005	29.181126233842292
2006	32.863648066990045
2007	36.80426799335427
2008	23.17945012395162
2009	25.684936084948397
2010	21.905671380630043
2011	32.8680146228034
2012	21.537623159924557
2013	24.831077834978135
2014	34.908960947738635
2015	33.16233240529057
2016	30.67330002056491
2017	27.309534084726337
2018	29.61080832335726
2019	28.17000764518286
2020	29.93059062167567