Year	% of total merchandise exports
1981	0.6115232426210049
1982	0.24799174524487294
1983	0.08341942693916213
1984	0.09984046159161007
1985	0.20998722580907853
1986	0.3330001273288958
1987	0.3758819403940095
1988	0.16880914057541327
1989	0.3709751553280917
1990	0.29166224013935343
1991	0.4304007097009114
1992	0.6878870689912053
1993	0.8377750681214152
1994	0.8738949175350197
1995	0.9216756835050259
1996	0.82992971602096
1997	0.683887217911364
1998	0.9895468414500649
1999	1.0815489471482334
2000	0.1578086619205957
2001	0.02806360565632506
2002	0.4432005104241397
2003	0.07008789309222607
2004	0.09278125727453786
2005	0.7341306893204742
2006	0.5820368291178585
2007	0.3889202559079387
2008	0.3508604771415649
2009	0.547426501780108
2010	2.3199046030067536
2011	0.3543883172543071
2012	0.3444484172800674
2013	2.565517445303916
2014	4.135302331919323
2015	0.39753868232825995
2016	0.5349955449462239
2017	0.33329164020940566
2018	0.682652763642136
2019	0.8325033208540661
2020	0.5413316102451494