Year	% of total merchandise exports
1960	6.048457878575356
1961	5.054318574106496
1962	4.044481042177161
1963	3.9721106582148162
1964	3.631598463888626
1965	3.6470801815764577
1966	3.4898996846925616
1967	3.3224541478678273
1968	3.397246288512703
1969	3.274383208484403
1970	3.02492870128028
1971	3.002343580200193
1972	3.1778160200441343
1973	3.3928836857371003
1974	4.478594230277839
1975	6.303741401517236
1976	5.915540427569518
1977	5.9646218887721485
1978	5.696833382811786
1979	4.941774235874434
1980	5.568517112243774
1981	7.151894484194756
1982	6.688566935623175
1983	6.175495840052732
1984	5.437683420404599
1985	4.712870461878502
1986	3.474467567770666
1987	2.8155676117579924
1988	2.7644547370118002
1989	2.6441624202293355
1990	2.656800062584872
1991	2.696026713733352
1992	2.6218310492551082
1993	2.5862127533376444
1994	2.162650978585526
1995	2.003061937079843
1996	1.972929251767476
1997	1.9492656211391428
1998	1.9880789859592958
1999	1.8950206910967504
2000	1.7945938395500731
2001	1.941707799259323
2002	1.964648536034025
2003	1.987610649083062
2004	2.113293745600722
2005	2.165473459708086
2006	1.9295995027984034
2007	2.017645952273995
2008	2.2587497246189803
2009	2.70683623640036
2010	2.5940207753778264
2011	2.271959009033104
2012	2.54748615685183
2013	2.4645463256102182
2014	2.5410565607157225
2015	2.480318058877694
2016	2.527840007854865
2017	2.4235252235641855
2018	2.276121908517207
2019	2.1575593958023602
2020	2.0335566678684223