Year	% of merchandise exports
1963	3.3478926413964745
1972	10.566466959502458
1973	10.065934969942038
1974	7.6449094829770825
1975	6.1479160223154095
1976	8.469547154761974
2000	16.21955074653432
2001	15.795169972398142
2002	17.836097316138243
2006	16.78136756726303
2007	19.02287128854692
2008	17.00882085606246
2009	15.250737292515298
2010	16.51933419837779
2011	14.974222060920424
2012	13.988456937476792
2013	14.618838787419003
2014	18.930498122850913
2015	19.03346211538083
2016	16.494058442762313