Year	% of merchandise exports
1963	14.266910369641094
1966	20.91290028385656
1968	18.714003387551642
1969	19.73545713756277
1970	18.68997750281832
1971	16.63078504595797
1972	26.330086625235683
1973	24.74363188203108
1974	15.878286504327642
1975	15.654873158006925
1976	15.216716030569666
1977	9.395612554238886
1997	9.0145682021121
1998	8.908888936719597
1999	7.585343670481268
2000	5.236076966806799
2001	5.664416365523386
2002	5.544785748042524
2003	7.123050378181607
2004	5.2527334558246315
2005	7.681100864437462
2006	5.312653071545912
2007	5.516890952257279
2008	5.4220193942426125
2009	7.0157114331435695
2010	6.312547406941169
2011	5.578940648112665
2013	6.609324787338134
2014	7.344294501339228
2015	9.458915720475979
2016	7.547374053064519
2017	9.608678802445699