Year	% of total merchandise exports
1960	0.2490819381372123
1961	0.1570857877987677
1962	0.1759212743229298
1963	0.25751599343709447
1964	0.11245995663242431
1965	0.32147888950480413
1966	0.40703397499993527
1967	0.34927939816831555
1968	0.44874866914143763
1969	0.6531899053841814
1970	0.5536012318992475
1971	0.7350067327811455
1972	0.8211166725193203
1973	0.7801332666683609
1974	0.5022392614466418
1975	0.7632232003990276
1976	0.6901601654039916
1977	1.3479165735314371
1978	1.4425130632917111
1979	1.540940228792551
1980	2.54362618945043
1981	2.429832014830861
1982	1.7346680507758272
1983	1.2246813734629622
1984	0.7732905236945701
1985	1.8806407570922952
1986	0.9618772528973724
1987	1.072408104313843
1988	1.5014814266967291
1989	0.9137554468494281
1990	0.6981401006304869
1991	1.2403591847416287
1992	0.6413506995330522
1993	1.3104516977175433
1994	1.8886177527965577
1995	1.7261152617084188
1996	1.876801728176973
1997	1.831679067095186
1998	2.0638521966557
1999	2.497541117145862
2000	1.9650626171383099
2001	1.9982751256489684
2002	2.2612774189286715
2003	2.11604734200199
2004	3.2096228046909396
2005	2.4118999721247034
2006	2.9373037356808354
2007	2.2833264020165416
2008	2.928743415659718
2009	2.99202731427993
2010	2.912914650398925
2011	3.0772025809024224
2012	2.901332291143628
2013	3.4186039086689846
2014	3.573332233966594
2015	2.397294503280326
2016	1.406439444620522
2017	1.2132250571707688
2018	1.2219868025189011
2019	1.0797026226334612
2020	0.923596775889284