Year	% of total merchandise exports
1970	0.16052266178677776
1972	0.031562704573085194
1973	0.04226061798026754
1974	1.485112563543936
1975	0.3871698067763748
1976	0.07449242903744097
1977	0.16247330795655
1978	0.16294075474157596
1979	0.054204599131177714
1980	0.1408330488221236
1981	0.17206477732793524
1985	0.6955673622340289
1986	0.6921641350310646
1987	0.5934036484753354
1988	0.35315545792027586
1989	0.8849022618198523
1990	1.0210078707491617
1991	0.8706961160340343
1992	0.632668938098879
1993	0.36719565274049637
1994	0.7367686353318339
1995	0.6799842848076401
1996	0.5062460257225493
1997	0.4949367623485872
1998	0.25791581399167446
1999	0.19187451153721757
2000	0.29291242115540783
2001	0.34352685777481473
2002	0.31282300889795517
2003	0.40743840003368215
2004	0.2490352737649924
2005	0.23317562804307823
2006	0.234972096577887
2007	0.27299038318742275
2008	0.3301278406874567
2009	0.2881829160440817
2010	0.2112369673665486
2011	0.2758559501835094
2012	0.3863454991576554
2013	0.34410110104151787
2014	0.47951698514478386
2015	0.43111513285813785
2016	0.31895989645641315
2017	0.24298000657908106
2018	0.4154921305758463
2019	0.5351255302066157
2020	0.5587733729801296