Year	% of total merchandise exports
1960	5.177514792899409
1961	4.716981132075472
1962	9.558823529411764
1963	3.65296803652968
1964	14.266487213997308
1965	14.729574223245109
1966	10.38961038961039
1967	16.56516443361754
1968	30.672748004561
1970	21.52300370174511
1981	45.977011492799576
1982	50.15790451793365
1983	21.124815645954094
1984	7.1134065649305604
1985	18.311997680402413
1986	2.825497357326082
1987	5.965833207090928
1988	39.18990842109159
1989	69.32501922230553
1990	74.94619521250813
1991	45.06863381876629
1992	63.11329932237264
1993	44.49751289223832
1994	65.3782642827371
1995	53.86609196041916
1996	26.85293597770539
1997	55.3353999552587
1998	32.69094804499196
1999	13.698248177989731
2000	5.99731798686928
2001	4.134494476072861
2002	4.002690124828445
2003	3.7528958792880975
2004	3.0653779913688197
2005	2.9623469213976916
2006	3.3674421211468872
2007	3.558054256663759
2008	4.9176215306981
2009	3.646462795707308
2010	6.084214380387183
2011	8.180022279277772
2012	6.433934431539316
2013	8.44536792019767
2014	9.379463877729394
2015	12.965836313699008
2016	13.933167428474988
2017	15.159976848559204
2018	13.588293593579511
2019	13.867090634917293
2020	12.482017883573615