Year	% of total merchandise exports
1962	51.85185185185185
1963	5.844155844155844
1964	3.2679738562091507
1966	10.771470160116449
1967	15.598080831823902
1968	15.995429081078068
1969	13.990076865729195
1970	25.474002042538086
1971	15.776993554276553
1972	15.968454140627925
1973	34.23160961398398
1974	26.649201665609574
1981	26.64920167672874
1982	26.649201654589945
1983	26.649201666072653
1984	26.64920166177614
1985	35.95206213176218
1986	22.61729039607015
1987	22.941593061006024
1988	21.613244329083006
1989	20.76085922287157
1990	32.2649871172988
1991	21.687237650694975
1992	9.920228370230566
1993	5.7135483889730105
1994	8.773922155361786
1995	6.957589195362243
1996	7.020764301320023
1997	0.8565525186273718
1998	1.0292115330361178
1999	1.0357357447348512
2000	0.6573419563645874
2001	0.6737838304359576
2002	0.7823395235687756
2003	0.9326355420323184
2004	1.7597182812924637
2005	0.5341247935360551
2006	0.6317056088527965
2007	1.2531736485376905
2008	1.094420020721284
2009	0.7306795291814301
2010	0.5875544608029859
2011	0.598200157802834
2012	0.39078931354048607
2013	0.4290326039693036
2014	0.4800870306337192
2015	0.4580099977751998
2016	0.46349504804802566
2017	0.47690423410507893
2018	0.7964028000936587
2019	0.8631339208080587
2020	1.0074322881750457