Year	% of total merchandise exports
1960	3.01255230125523
1961	1.9945602901178603
1962	6.309420916162489
1963	2.15311004784689
1964	2.2515527950310554
1965	13.761467889908257
1966	5.464868701206529
1967	9.899665551839465
1968	10.846394984326018
1969	6.7515701325889745
1970	3.638440202316854
1971	5.155445180279617
1972	3.293981407019011
1973	5.3502196950116305
1974	12.57735967252422
1975	7.42739655615523
1976	7.133609200071082
1977	6.162516496116652
1978	5.357753885497146
1979	4.3380067529795845
1980	4.503802783485311
1981	3.5215183605213274
1982	4.854069261440686
1983	5.9288782305687375
1984	5.732193838170608
1985	6.6439828080229235
1986	8.921696706244148
1987	5.98176103869339
1988	9.422134703177266
1989	8.10102381053933
1990	7.647792902436319
1991	7.427812212162685
1992	6.944488904397998
1993	5.111830122093359
1994	4.8964119368735055
1995	4.973209559029219
1996	5.813489008502426
1997	7.482408338049639
1998	6.857114023769145
1999	5.776792104218275
2000	6.372317652893391
2001	4.589905711718454
2002	4.940238320808475
2003	4.171691389104242
2004	4.45657319017268
2005	5.180677909664923
2006	5.391290001145985
2007	5.52285549945289
2008	9.682254469039222
2009	7.020508974204262
2010	7.9395855690583685
2011	6.456579925138521
2012	6.774378487189697
2013	6.985475153199797
2014	7.123422063363758
2015	6.211925476201995
2016	6.722691172552592
2017	6.393839420745036
2018	6.5182590390401876
2019	6.253512465546206
2020	7.844267724450744