Year	% of total exports
1995	4.785380913555528
1996	4.376458329926381
1997	3.7320108698387298
1998	3.2192407851065834
1999	3.3368799572394954
2000	2.8414964959783022
2001	2.8259550785657424
2002	2.6169609759391896
2003	1.9421882855523975
2004	2.164424118900801
2005	2.1576135773824645
2006	2.2234938793669894
2007	2.3547639692453752
2008	2.3941539109952927
2009	2.4897034509266565
2010	2.985991281973968
2011	3.1564628251978455
2012	3.2376954646129117
2013	3.2050962278060715
2014	3.170294626000237
2015	3.024451155086368
2016	3.604740193950562
2017	3.3721636415220884
2018	3.03928054267298