Year	% of total merchandise exports
1963	0.5706134094151213
1966	0.27932960893854747
1967	2.877708675290256
1969	2.160373210883689
1970	1.831164071827972
1971	5.61061061061061
1972	3.186812303587073
1973	2.8217286310811494
1974	3.2114508783344173
1975	2.6594207087934323
1976	5.731525916552806
1977	8.071546958679427
1980	3.1601523698159806
1981	3.011046563561228
1982	4.480615541028494
1983	2.9495724780465165
1984	1.9480232447302899
1985	2.483166118337451
1986	8.521301035468854
1987	5.959160565452449
1988	2.5021262652974015
1989	3.098668932002282
1990	3.7278928713993484
1991	2.3284294951625615
1992	3.408638368927893
1993	0.2044071270471317
1994	1.220436690565609
1995	0.9485095326192526
1996	6.096871079274322
1997	6.976223840441411
1998	7.457104624452773
1999	5.086355522516222
2000	2.8055404404498003
2001	2.3438112569565637
2002	2.3760360817089774
2003	3.2532126830893495
2004	3.0006658911899615
2005	3.3243215415888447
2006	3.402662410533988
2007	4.019932568730736
2008	5.594539925408949
2009	4.882626129146751
2010	5.475501450444561
2011	5.704276157277
2012	0.5579117608644985
2013	0.12281024860200686
2014	0.12200307710586322
2015	7.7307527132511416
2016	4.765900743284631
2017	4.791140082603214
2018	4.388744656952617
2019	5.8434242711466045
2020	6.419682183528991