Year	% of total exports
1995	24.31183079477773
1996	22.808653614878725
1997	22.75878505947813
1998	24.046113205850492
1999	24.379218835925897
2000	21.691043967257663
2001	19.79637460036975
2002	19.595961680477746
2003	18.938664372624665
2004	17.703062363033926
2005	15.94358525727691
2006	15.085470447952929
2007	15.174890493145758
2008	14.173950503215103
2013	12.921696790786225
2014	13.81752335113201
2015	16.849687707790665
2016	19.5098895305125
2017	19.050573127594777
2018	17.587804597463442