Year	% of total merchandise exports
1960	1.8308080808080809
1961	2.6543566070398152
1962	2.9883785279468733
1963	1.9230769230769231
1964	2.574712643678161
1965	2.8089887640449436
1966	3.642919308715653
1967	3.1067086897793788
1968	4.060218978102189
1969	14.836253018828943
1970	2.1471808175409284
1971	3.4832220240800957
1972	2.2640480816254542
1973	3.8458285600055353
1974	5.750142862820173
1975	4.1800355595520315
1976	4.0054497708394425
1977	3.394784384045561
1978	5.360451513158685
1979	4.500411872688563
1980	7.036819173247406
1981	5.422717690385618
1982	3.1601550102073204
1983	3.2343188968550067
1984	6.391742031353684
1985	6.831052674238713
1986	6.356522560750383
1987	5.169531405669936
1988	4.811530938492596
1989	3.0758942815522796
1990	5.068441364272151
1991	4.3120230757411715
1992	4.582963762102979
1993	5.5712894893760465
1994	4.244372937625279
1995	4.362938624172292
1996	4.8664964765522765
1997	5.723726098134485
1998	0.42664335169811785
1999	0.5922981069225508
2000	0.6763561419484524
2001	1.0533900666383753
2002	1.135018542613515
2003	0.707848326473363
2004	0.9566192497059518
2005	0.8888253392476415
2006	0.6869185263508221
2007	0.6339395330871873
2008	0.8485507031984545
2009	1.5350314698972858
2010	2.0578262757111077
2011	0.7439656123979617
2012	2.1314509875214886
2013	1.3621611326816674
2014	2.7992889780878256
2015	2.0720307940412175
2016	1.4872409332041798
2017	2.2033260844792313
2018	2.7221140918952234
2019	2.487807639408921
2020	2.3347185860040214