Year	% of total exports
1995	60.577091909397815
1996	67.1162761427282
1997	70.53830505674257
1998	72.58754013641634
1999	71.14874004308405
2000	74.05171022440823
2001	69.72435145378812
2002	63.606016712885314
2003	70.1831707280032
2004	68.55168390233769
2005	68.35871526687293
2006	64.06885028860145
2007	42.38316848672588
2008	47.99224571536799
2009	43.42955049452438
2010	39.661315359574836
2011	41.58889671812145
2012	42.654443070663355
2013	42.08234455080492
2014	84.45768103560593
2015	82.57722551048286
2016	84.4032195300034
2017	84.44222679479914
2018	88.77486524556124