Year	% of merchandise exports
1963	3.9636722465645144
1972	48.72342400656472
1973	51.89837113754883
1974	37.90781863466081
1975	37.12818608836967
1976	30.85971542598519
2000	0.5598230814524043
2001	1.1203041671714111
2002	1.041813683018868
2004	0.2920220443482964
2005	0.2630378799372882
2006	0.1773894656545505
2007	0.10062207492007391
2008	0.04877374068645345
2009	0.03050935747342659
2010	0.028224625172880446
2011	0.01922833756980792
2012	0.01510521220336913
2013	0.00938907649006564
2014	0.009232477722462927
2015	0.0070431136175823405
2016	0.0008088816556546487