Year	% of total merchandise exports
1972	10.405741098537124
1973	9.827954571010908
1976	10.046437106235064
1978	9.57290767903365
1979	9.364013084938147
1980	10.274549086876211
1981	5.473836955775465
1982	5.473836954766184
1983	5.473836955020967
1984	5.473836955525966
1985	5.47383695563599
1986	4.825466180003274
1987	5.366580218151333
1988	8.76866954073741
1989	6.853015479085377
1990	4.669123023179896
1991	5.8179349583826125
1992	4.457179868328401
1993	2.9340312650959803
1994	3.132052960686783
1995	6.187213285371624
1996	6.98983079175743
1997	8.127557096086466
1998	5.971662643612382
1999	6.608000998281052
2000	6.396767483645154
2001	8.071014319918977
2002	6.165683988479113
2003	6.3951683153940095
2004	5.509653800368264
2005	5.607155192494496
2006	5.094116009814462
2007	6.154751211250742
2008	4.66480651905787
2009	7.617147515664062
2010	8.310836305743875
2011	8.485871336180491
2012	9.962086145354744
2013	11.514313456255284
2014	12.374570858210728
2015	12.674545348276439
2016	14.213756273880016
2017	16.06157541011196
2018	17.55150717746046
2019	17.59796159616411
2020	20.26565703265756