Year	% of total exports
1995	60.2606243815133
1996	53.26230255270137
1997	56.690852619756214
1998	59.36990174267061
1999	58.10803471168364
2000	56.68353676506497
2001	55.88859774832136
2002	53.13358698334494
2003	57.64563872299804
2004	57.4972252143382
2005	51.34324137904375
2006	52.18935002024744
2007	55.177886148077434
2008	53.41538069583984
2009	56.73955250150202
2010	50.66469409664928
2011	46.17365058833947
2012	45.41285564500768
2013	42.16370352932633
2014	38.82327542168929
2015	41.30148849179418
2016	44.437592672110284