Year	% of total merchandise exports
1967	0.23828435266084197
1971	0.018068082488121456
1972	0.05833137444389305
1973	0.04531553997400462
1974	0.08592545284184255
1976	0.05714386015551711
1977	0.046465156121499256
1978	0.03949709539614333
1979	0.0027411771675858454
1980	0.00036153237667046036
1982	0.034812602161982634
1983	0.0022398603760635976
1984	0.009804149970490481
1985	0.04536167571059475
1986	0.15457592815128707
1987	0.08007168086175445
1988	0.23342472268312173
1989	0.5500825631084932
1990	0.13598017225397988
1991	0.10939720097830774
1992	0.16237898555974511
1993	0.3309677873808895
1994	0.20466639384663193
1995	0.3963529227191042
1996	0.2821396641171775
1997	0.34448780896354947
1998	0.6165381955990449
1999	0.5256257787214823
2000	0.33883934856656134
2001	0.17594487925498975
2002	0.6813674485686834
2003	0.5106095801813804
2004	1.4863659342585172
2005	1.9683537306716232
2006	0.7742206673160625
2007	0.9081500170643461
2008	0.6974589797388153
2009	1.0706151282949024
2010	0.6882653881237334
2011	0.7286464536677402
2012	0.5840095827033067
2013	0.8061414532582788
2014	0.5323251543399384
2015	0.681196006986664
2016	2.7044839811824155
2017	1.5123244993197795
2018	1.1030509286556929
2019	0.9608728705852162
2020	0.9061496587741423