Year	% of total merchandise exports
1981	66.12237166050726
1982	38.201443312385116
1983	32.081470796168205
1984	25.894945343630727
1985	25.682700213324516
1986	46.20239126281245
1987	73.81310502250513
1988	54.550039620659
1989	56.68850022283721
1990	58.18711902713215
1991	45.623512890084555
1992	71.00001144410571
1993	54.51713391601232
1994	60.04256754071508
1995	73.75308634055871
1996	68.51260987195926
1997	62.2524078249767
1998	56.9258228867032
1999	49.87657714250685
2000	7.66397922688053
2001	5.228519448940327
2002	24.388594041481397
2003	20.00036073361424
2004	19.848308438927887
2005	23.115170539556114
2006	16.149318876899333
2007	13.078483468649086
2008	13.213481133417334
2009	52.62394236413456
2010	30.434302645398574
2011	46.42746382348403
2012	42.33412401904852
2013	36.767359760691164
2014	45.4716359297462
2015	52.23363913695274
2016	52.60047432485059
2017	52.005045327401334
2018	55.362062698371005
2019	46.103371255866
2020	50.49408319731848