Year	% of total merchandise exports
1960	8.113035551504103
1961	9.694323144104803
1962	9.531635168447
1963	10.085836909871244
1964	8.265027322404372
1965	8.9171974522293
1966	8.55148342059337
1967	8.771929824561402
1968	38.16212260999586
1969	37.95664199855817
1970	37.83404863147686
1971	40.92441843897528
1972	34.8436870126079
1973	33.06660231251561
1974	32.319016770196676
1975	32.83573867098487
1976	29.18361229585862
1977	18.85616448769907
1978	18.20574317500348
1979	20.004244932611694
1980	24.250208295494186
1981	25.481577235259355
1982	23.996065509072587
1983	25.082801376873036
1984	20.927032023984392
1985	20.92703202410692
1986	20.927032023821678
1987	26.01786031706206
1988	23.589491242775033
1989	23.589491247334987
1990	35.07668407986719
1991	15.63822779167389
1992	16.536048217738568
1993	28.74964312016472
1994	35.24647075822608
1995	41.213085606970054
1996	40.12782789064949
1997	39.355178555713586
1998	38.57942698737616
1999	30.193852963024998
2000	38.74960062910856
2001	41.04232687402104
2002	40.5021694769619
2003	40.880645637588806
2004	42.24096254322716
2005	41.48467155852536
2006	35.560985049443005
2007	37.68523639593129
2008	39.62348221448481
2009	40.82588479854967
2010	38.266205711782526
2011	43.20760024800482
2012	41.35957447599813
2013	40.26672190647512
2014	37.867031616870314
2015	37.38152825290936
2016	36.457438429181195
2017	34.01181003921032
2018	31.525864893393933
2019	33.77235774199147
2020	34.334751738328116