Year	% of total merchandise exports
1960	3.126351767853053
1961	3.8031023644533444
1962	3.330782601990936
1963	4.385739247187448
1964	5.968785462691406
1965	6.930075067679085
1966	5.028658145131475
1967	3.5939184494614156
1968	3.323997726426072
1969	4.757224280388204
1970	4.650320733255804
1971	4.597958145324139
1972	5.79755464204323
1973	5.576680341367609
1974	3.271976591438952
1975	1.9432753998903758
1976	1.7276296853077875
1977	1.7768874061245516
1978	2.0193507054974438
1979	1.5541464264418472
1980	1.2922423656369328
1981	3.578706452511064
1982	3.0243814597147787
1983	2.626545585870889
1984	3.0015725338280217
1985	2.6164709142384623
1986	4.333368272083172
1987	4.770291395597505
1988	5.016742425786374
1989	4.699522534589488
1990	4.539832053998783
1991	5.677724726956476
1992	7.653873509450603
1993	8.051762494472888
1994	7.813365857225342
1995	7.588456568762035
1996	6.251400430712603
1997	6.19714492294904
1998	7.278248324590219
1999	6.205068409045194
2000	7.6494037580898455
2001	8.398522612290009
2002	9.816320249617188
2003	10.192783293801062
2004	10.119670980064646
2005	8.140595540129116
2006	7.880615986417565
2007	10.921106468515964
2008	11.016658252667415
2009	13.511838455591866
2010	10.792585627860825
2011	9.326900837286683
2012	7.82406977421293
2013	9.512194560840992
2014	10.713728000289962
2015	13.90197351691366
2016	15.068842213927248
2017	13.78057238390247
2018	12.204591934239051
2019	12.993433379111007
2020	15.546718197883317