Year	% of total merchandise exports
1967	4.058782365290413
1968	3.1995346131471787
1969	0.4166409163010114
1970	0.02692752522800109
1971	0.12423003261038355
1972	0.314254126362864
1973	1.1702974554456018
1974	0.8737244463421447
1975	1.1090588003917188
1976	0.6020893360813048
1977	0.6316585324023918
1978	0.28142692784198836
1979	0.504940661704756
1980	0.36211557096955166
1981	1.1428339027167724
1982	2.339173231961508
1983	1.799406977947065
1984	0.7421841680916657
1985	0.7711288324810387
1986	0.2615166867092468
1987	0.46323649574476106
1988	0.7303699512282946
1989	0.6436911286734621
1990	0.9108671899618751
1991	0.6111777317146886
1992	0.3999101374547961
1993	0.3462459348023499
1994	0.8976260244430209
1995	2.8524319211322076
1996	1.4821518811351837
1997	1.3130641925036197
1998	1.4684050835651192
1999	0.705616833622691
2000	2.6660042613424637
2001	5.295446747897157
2002	3.5782359096538325
2003	6.035629373843123
2004	6.008254858415089
2005	5.748631556747223
2006	8.642950502298568
2007	11.58371494291297
2008	10.308105109179573
2009	12.07052986987851
2010	6.221990082021491
2011	5.023928387621672
2012	5.9470883652282795
2013	7.274853448497562
2014	7.987321015809952
2015	1.984692048281386
2016	1.902777992605013
2017	2.9708994612596706
2018	3.3560816496089925
2019	2.677467566182146
2020	3.094720608490269