Year	% of total merchandise exports
1981	17.882174652582272
1982	32.84610079669082
1983	34.576209996916454
1984	41.392808481356155
1985	22.573863873582926
1986	12.80276522998263
1987	14.153787454333195
1988	15.375584151335598
1989	8.5548488577795
1990	9.219381012495543
1991	8.896088411752846
1992	7.804355526684064
1993	4.920964468103061
1994	3.248426066199845
1995	14.160151241641323
1996	6.618070481916927
1997	14.66565004810844
1998	17.641375185079557
1999	30.093688590334704
2000	31.272827613532243
2001	58.75120935224647
2002	12.592684270597934
2003	17.917403044025168
2004	17.942684378476535
2005	15.216071753960497
2006	16.142599828621485
2007	25.530736108353707
2008	39.46405482434714
2009	30.07446388059542
2010	22.068331679873854
2011	21.144977619111234
2012	27.809812178610716
2013	30.43093444869721
2014	27.778799004451226
2015	24.88111083768426
2016	26.134298524385557
2017	26.175694465406863
2018	21.91416744367192
2019	26.690930118165795
2020	23.31532375717021