Year	% of total merchandise exports
1960	100
1970	94.38374589989853
1981	84.67804325942042
1982	90.55813721200356
1983	86.31961884676134
1984	86.72876968926516
1985	87.68133855435708
1986	87.93751981929047
1987	84.38572946386829
1988	82.74470681721586
1989	78.31470756976306
1990	74.89811214155877
1991	75.83012205894396
1992	70.20303441014408
1993	76.91241121857281
1994	58.1759712539315
1995	77.15969748402568
1996	83.9161290237219
1997	91.91422459314673
1998	90.87026237477691
1999	89.95043090850278
2000	81.4099010414632
2001	84.49949170689376
2002	75.12601292158321
2003	76.68325948579017
2004	64.56265101515442
2005	71.89702134272461
2006	63.61297370498109
2007	72.60534427760884
2008	69.66681576602124
2009	79.98315940764287
2010	75.11136564431911
2011	79.40684281603025
2012	80.866508769587
2013	78.76328153128976
2014	53.85991644940742
2015	45.171952518145496
2016	59.706043693515035
2017	49.15798717563566
2018	43.635574819485605
2019	55.15776502925146
2020	49.722038405655134