Year	% of total exports
1996	3.8515076582305614
1997	3.2096263133159777
1998	4.68229192348331
1999	3.444470107414805
2000	2.2140152440427197
2001	2.754916380375949
2002	3.114996112861555
2003	8.03237552281576
2004	7.128197634461336
2005	5.495357012454075
2006	4.879596169083222
2007	4.9971475824916025
2008	4.4431777123886596
2009	6.566791527590942
2010	6.213604601949223
2011	4.409347479995279
2012	4.816595541021266
2013	5.0529507413951045
2014	4.958915668799633
2015	7.322380882667509
2016	8.504985847851664
2017	8.765432812454558
2018	7.31680553220836
2019	8.284238852634434