Year	% of total merchandise exports
1964	0.2770083102493075
1971	0.11932015261879986
1972	0.32614983200206765
1973	0.45294869601103177
1987	0.0027626440675970576
1989	0.005780278479055296
1990	0.024160180761856515
1991	3.0636750747803316
1992	1.1337374692675808
1993	2.179375933840289
1994	2.3508004149913777
1995	0.7370021138636201
1996	2.694416914181102
1997	3.0763267064943576
1998	5.003825387263428
1999	1.9597227402943995
2000	4.547390642466347
2001	11.849837061757535
2002	7.931699558975877
2003	5.0792939458760715
2004	5.0933685461279214
2005	3.7901669698629727
2006	5.555245655997726
2007	2.692481360024606
2008	3.373129042277016
2009	6.986973131840725
2010	9.853770080286505
2011	5.310267192275545
2012	8.2866568121692
2013	4.387602629909782
2014	7.211657199382014
2015	8.298803902827048
2016	5.531999338513674
2017	8.480830169175945
2018	8.763348376252225
2019	11.589642153606453
2020	6.764862695125149