Year	% of total merchandise exports
1981	29.808721096305803
1982	34.14321694253472
1983	46.55220855286384
1984	46.41900647192494
1985	59.71647883781609
1986	57.94951397373998
1987	69.34423894826851
1988	70.06932710560415
1989	92.15237687395337
1990	86.70865325466696
1991	88.68008261139335
1992	84.61553353473104
1993	91.87044506320132
1994	92.45032983188426
1995	88.11893446047593
1996	73.92391002499306
1997	72.33560090702947
1998	61.6546438232642
1999	60.2314874158027
2000	55.35056265167376
2001	50.27188813237472
2002	38.26631091067171
2003	42.27204056402049
2004	35.515070369212864
2005	28.19889710570937
2006	28.012385105350596
2007	24.05037448257819
2008	23.5142710655727
2009	23.529775379068216
2010	21.77205836551918
2011	24.590357720117385
2012	18.877748810814982
2013	23.262125854897857
2014	23.641942509126082
2015	27.66547874177356
2016	35.149867460229416
2017	29.99364272073133
2018	29.666373196271973
2019	21.718008581679815
2020	20.88128537430408