Year	% of merchandise exports
1966	30.96960497788282
1968	16.090812532145225
1969	20.547007064170444
1970	19.983274979430433
1971	12.352763611619821
1973	12.296585172942823
1974	3.8823692837930484
1975	4.070764137212267
1976	3.053120327136308
1977	2.289471632408552
1978	2.4095780270402583
1979	1.1364482457260734
1980	0.7702268334231913
1981	0.9315551841088405
1982	0.6238730451916461
1983	0.3387959196096914
1984	0.4052058153676553
1985	0.5506027978580502
1986	0.3350357994337734
1987	0.3646217855614936
1992	0.7275048394791438
1993	0.9791747078656112
1994	0.4005670788250819
1995	1.179713399784435
1996	1.2234541376345778
1997	0.2681846677580134
1998	0.34163930157430855
1999	0.22312446120830715
2000	0.16345838056273349
2001	0.14860644405786305
2002	0.23163836559264495
2003	0.20958769536593894
2004	0.19361970668616585
2005	0.1530828614629639
2006	0.16046755616138292
2007	0.16301415423653115
2008	0.16030478174001084
2009	0.2572575434483429
2010	0.5606493578776985
2011	0.4884330817995201
2012	0.44506497111260035
2013	0.6142797035998695
2014	0.5397471616427789
2015	0.6819042728616614
2016	1.102852967241578
2017	1.0011783650831487