Year	% of total merchandise exports
1960	1.1211968716952652
1961	1.3474201844722493
1962	1.4622908144495452
1963	1.4215647911587586
1964	2.492342561661973
1965	2.6892615097746644
1966	2.6275893074004344
1967	1.78679584046845
1968	1.8241712027766692
1969	1.348323074878544
1970	1.5850095798263
1971	2.1556155998182733
1972	3.4063709852571087
1973	5.20441031355886
1974	6.473305432820515
1975	6.2172951544598645
1976	4.097854026541647
1977	5.65406794780066
1978	5.485146013020735
1979	5.212239485100961
1980	5.777763188816164
1981	7.269438287633914
1982	6.742757772637908
1983	7.872058266638486
1984	7.640236588707336
1985	8.915101402140731
1986	6.869177726936418
1987	6.1886831758479754
1988	7.2933543047346605
1989	6.6169883286910816
1990	6.381522207893616
1991	4.940585156284764
1992	5.290610676430745
1993	5.293284608309114
1994	5.140938560661381
1995	5.697466932720153
1996	5.739153845592205
1997	5.657186950504151
1998	4.6904208586466805
1999	4.134721459535026
2000	3.7043059122350597
2001	5.0852053942455635
2002	5.859868644416642
2003	7.190246306438103
2004	7.637895325329434
2005	8.54256367996812
2006	8.9394959664793
2007	9.713650284127688
2008	10.705711028968572
2009	12.685849363597171
2010	13.792428000864012
2011	14.530254801146883
2012	14.593625014904966
2013	15.279839568930562
2014	14.899647403191643
2015	14.459208630298887
2016	15.042900103679582
2017	16.68744534513379
2018	17.589684141945515
2019	17.65756991441022
2020	19.38662993390865