Year	% of total merchandise exports
1960	3.2051884575618006
1961	3.45901864663032
1962	3.410208277464915
1963	3.0761738565804957
1964	3.112545074966787
1965	3.882689987937274
1966	3.532287012639859
1967	3.5609529390679766
1968	3.3255690485578158
1969	5.146770686153303
1970	5.525506868369071
1971	4.698410911615166
1972	3.6758930461162196
1973	3.458982046032935
1974	8.502556541689229
1975	12.35143704048436
1976	8.187786803235598
1977	8.187892576180445
1978	6.7718794128119955
1979	5.884043882688169
1980	6.553893742021611
1981	7.047407785963829
1982	5.045556933150313
1983	9.00745583399829
1984	7.786233030069985
1985	5.081065984915539
1986	3.2601737627840235
1987	3.0223839263744856
1988	2.603872611526247
1989	2.184083838745647
1990	2.767320324153232
1991	3.393946228431238
1992	3.8432130407217047
1993	3.3244908993878046
1994	2.1350623112959055
1995	2.2007443894279843
1996	2.3848083595753264
1997	2.229312416147866
1998	2.3446739360268776
1999	2.0717771715610156
2000	2.340604427608418
2001	3.0240484292524825
2002	3.2512357432604624
2003	3.3139703947493127
2004	3.443949159848777
2005	3.2984938566102753
2006	3.623225235301054
2007	3.89224883113102
2008	4.028411481088488
2009	3.9081254599699995
2010	3.6099824369352005
2011	3.1058024387568985
2012	3.723292792599997
2013	4.0907395650580245
2014	3.977823381754206
2015	3.2811815256795516
2016	2.9734758448027034
2017	2.896264414021606
2018	3.262032773733998
2019	3.5678739023148998
2020	2.9798028470497373