Year	% of total exports
1995	44.42473586007761
1996	26.4519854411876
1997	21.006904684955032
1998	11.83577259773142
1999	20.955943844760025
2000	18.16694178850322
2001	17.258535393471618
2002	38.70618151951793
2003	33.92634491393586
2004	27.935918692989546
2005	24.447804751724117
2006	7.602845819176012
2007	6.65622583235172
2008	10.288714119993642
2009	6.78776940894446
2010	6.236995440728792
2011	8.17443437864548
2012	3.8169613319528595
2013	3.7556290877144884
2014	2.328277092968572
2015	4.734133430262756
2016	5.201886221184151
2017	4.621621993531386
2018	5.28496038226782