Year	% of merchandise exports
1963	14.266910369641096
1966	20.91290028385656
1968	18.714003387551642
1969	19.73545713756277
1970	18.68997750281832
1971	16.63078504595797
1972	26.330086625235687
1973	24.74363188203108
1974	15.878286504327642
1975	15.654873158006925
1976	15.216716030569668
1977	9.395612554238888
1997	9.0145682021121
1998	8.908888936719597
1999	7.585343670481268
2000	5.4052003557525525
2001	5.73519382995146
2002	5.619266322081409
2003	7.21328921427963
2004	5.33836956189692
2005	7.744065867291288
2006	5.375280423870143
2007	5.679414436130685
2008	5.570443586749923
2009	7.149048473766368
2010	6.429168252263596
2011	5.63868567692279
2013	6.6840197664559895
2014	7.4491239440548425
2015	9.60828394287151
2016	7.712098948960302
2017	9.775064180559129