Year	% of total merchandise exports
1972	0.8688362167517718
1973	0.6413308314896239
1974	1.2067322959669735
1975	2.173647202690309
1976	1.9654362918935118
1977	2.366838941039975
1978	2.086743044189853
1979	2.0775538822668658
1980	1.542705999974689
1981	3.219814241486068
1982	3.8616774731140793
1983	2.1547083344836153
1984	2.155801769303444
1985	2.478751414069617
1986	3.421043750210932
1987	1.848068350668648
1988	2.6689798858364377
1989	3.3836414575403264
1990	2.0777640022039683
1991	0.9514134572390592
1992	1.0541617532308127
1993	2.163377505025379
1994	1.4257061345822857
1995	1.655152517821235
1996	0.984632890283938
1997	1.1298004434654896
1998	0.7959712032860262
1999	0.6031616020307704
2000	0.6866803715806956
2001	0.5610080423905344
2002	0.652927370413186
2003	0.6702736517542827
2004	0.9375286053484694
2005	1.0897279185547641
2006	1.6229306895145128
2007	1.7870393156592068
2008	2.4893573509830738
2009	2.8217958955111135
2010	3.5504368840447125
2011	3.2706460175533407
2012	2.762186069989133
2013	3.4171002556767345
2014	3.3199739381955444
2015	2.8590910928771303
2016	2.8669610837963773
2017	3.0385616756239004
2018	2.4101283152512862
2019	2.385277016346145
2020	2.97110310294272