Year	% of total merchandise exports
1964	0.6342494714587738
1965	0.8583690987124464
1966	0.23255813953488372
1970	0.013046314416177431
1971	6.803845762539424
1973	0.5658108777141241
1974	1.0473850535559668
1975	0.6832193700257819
1976	0.6195636596148122
1977	1.274626101923569
1978	2.4110688815817567
1979	0.32258552424521325
1980	0.03035959283507003
1981	4.113466901858085E-05
1982	0.09416266745749192
1984	0.05338733217468062
1987	0.07989036184332014
1988	1.440885236563711
1989	0.0007953102972365611
1991	0.00032017827525237066
1992	0.00031901284662891707
1993	0.049312048565287966
1994	0.1271463209569998
1995	0.0728622688132292
1996	2.8115626225293098
1997	8.758349708677018
1998	4.773517519177574
1999	5.733242769573215
2000	12.967376887798707
2001	21.65848249875053
2002	19.11496381717243
2003	30.48105391753809
2004	39.41525475637373
2005	40.08153547517034
2006	39.569214107302805
2007	49.290358046380625
2008	38.78847915459863
2009	23.725750161698414
2010	21.684335654765277
2011	30.696730405131685
2012	24.71947740133752
2013	45.237308720386
2014	26.030953923471806
2015	18.985492964068225
2016	13.341115510514525
2017	39.08127392234195
2018	64.05580794939526
2019	61.74538814999556
2020	65.23857774954023