Year	% of total merchandise exports
1960	4.3050742526257
1961	3.9790962570527046
1962	3.5602720268460764
1963	3.4135614542709773
1964	3.1438109812039388
1965	3.058861812015678
1966	2.985630072543287
1967	2.6762247814334024
1968	2.7267449360183416
1969	2.7647237366633015
1970	2.5061151724529718
1971	2.5895149130351456
1972	2.6923352679639883
1973	2.8411118663324695
1974	3.953300525503055
1975	5.630297912056677
1976	6.056873686931482
1977	6.623873972486336
1978	6.4826758303541165
1979	6.5458661917087175
1980	6.88833479450177
1981	8.24622414620373
1982	8.717727947135481
1983	7.6993049663372375
1984	6.440456958318679
1985	5.491277965105681
1986	4.262130518951205
1987	3.633556480915675
1988	3.484084991795297
1989	3.335529608698242
1990	3.075107731970028
1991	3.1858513907805626
1992	3.281168529840822
1993	3.3367542482922175
1994	2.918609691555644
1995	2.6779451038141335
1996	2.73726491305979
1997	2.757857482406331
1998	2.8902017835265768
1999	2.561797687561666
2000	2.3200154231055072
2001	2.5664012082141894
2002	2.6327916077238442
2003	2.6448214009206934
2004	2.7017003671337503
2005	2.942791333844919
2006	2.9929637221607437
2007	3.1569681603859876
2008	3.639113392082903
2009	3.884035626763102
2010	3.6154067809823847
2011	3.3955010301174093
2012	3.9048016122323213
2013	4.131929050619539
2014	4.147307815213954
2015	4.223838341252729
2016	3.9227911450760127
2017	3.6037132167697745
2018	3.3098755305508543
2019	3.370622899877371
2020	3.0692055592486884