Year	% of total exports
1995	67.6696850396247
1996	55.78919316290499
1997	56.15810303228474
1998	55.90475318855091
1999	57.88853578931641
2000	56.61624812756567
2001	56.71397236070444
2002	54.64060018278836
2003	55.84730915002146
2004	62.10399853139132
2005	49.45853393213779
2006	48.90860019551807
2007	46.715623181985
2008	43.24855822531441
2009	45.30841377102403
2010	41.427121001169915
2011	37.90329272716371
2012	37.90493753499843
2013	38.16049262685242
2014	51.3523563397059
2015	57.061568307135
2016	61.51116448691555
2018	64.02134064341956