Year	% of total exports
1995	61.40770888197269
1996	60.02363800090041
1997	56.13904142453473
1998	50.08492758805635
1999	40.36354370169022
2000	39.6247716029746
2001	39.85808373236719
2002	47.57061047869164
2003	49.39725499779234
2004	44.090478909790086
2005	36.576504867319095
2006	43.77671356464884
2007	41.129577516519625
2008	37.34960519949011
2009	33.15285851318022
2010	32.67783706153165
2011	31.465363458846323
2012	29.54616176143958
2013	27.831073903752895
2014	81.07489055737005
2015	82.61901222405962
2016	83.27355051874652
2017	83.3720251825318
2018	88.20589752616094