Year	% of total merchandise exports
1960	36.42691415313225
1961	27.91250594388968
1962	30.254777070063692
1963	30.54799844539448
1964	26.374608851139918
1965	28.934967012252592
1966	40.53030303030303
1967	29.992169146436957
1968	28.102189781021895
1969	31.63900178523949
1970	30.183528700563905
1971	29.33416475008908
1972	28.510555248349217
1973	11.598501046049153
1974	24.826532362434317
1975	5.410387691841489
1976	18.6633228970337
1977	26.203509941239606
1978	13.23054916390774
1979	20.475191634406283
1980	21.555134710556622
1981	13.105130199518966
1982	13.105130199444051
1983	13.10513019807046
1984	13.105130202285697
1985	13.105130200701778
1986	13.10513019736936
1987	13.105130197780065
1988	13.105130201593534
1989	13.105130201251372
1990	16.274334850492348
1991	13.22358187282806
1992	20.432463004356443
1993	18.963231886711583
1994	17.351604784291293
1995	16.09272165115946
1996	14.560197726449426
1997	17.322672031115996
1998	17.973945451815457
1999	13.325902739702379
2000	8.59840892295117
2001	10.642258238745406
2002	13.332171579161125
2003	10.218395337334146
2004	8.890215242925851
2005	12.024141190655115
2006	13.259647491141848
2007	16.377868950882743
2008	14.907597725259384
2009	19.298323485597372
2010	15.709449809526694
2011	16.377495746333963
2012	33.29492211077746
2013	8.234426947827515
2014	5.408018226553637
2015	9.696110118108832
2016	10.57364272048632
2017	8.789024472438678
2018	6.198844028936225
2019	6.377092476988835
2020	6.3306114237267614