Year	% of total merchandise exports
1974	16.9744268146629
1975	20.950417345615378
1976	32.99305596771322
1977	38.917388226324675
1979	30.661603361861655
1980	25.486545568395925
1981	29.853164039926757
1982	28.809427713822167
1983	29.789676168068297
1984	28.676121633968148
1985	28.676121631128666
1986	28.676121630985698
1987	28.67612163147725
1988	10.298864683940764
1989	10.298864686234618
1990	5.843243388309918
1991	14.028957142504836
1992	14.858731373974866
1993	16.713848284721053
1994	11.76757076362032
1995	11.471110919653674
1996	10.429603520356364
1997	6.882817385540154
1998	7.862610011272928
1999	7.355889653555692
2000	29.54476036254661
2001	33.57000095003554
2002	36.397407479163995
2003	42.613264562465375
2004	42.35139021294522
2005	45.716997761461705
2006	40.34889212005153
2007	44.766917647740186
2008	58.71195837387377
2009	62.63559111081322
2010	58.32036956433308
2011	60.12320174064606
2012	60.40012121337321
2013	68.46965332639276
2014	49.75261608514215
2015	85.66033655193519
2016	69.87851485550321
2017	59.98259888555138
2018	61.28844062297026
2019	58.81510939091338
2020	60.79190405183954