Year	% of total exports
1998	22.864539325195928
1999	19.91561451883569
2000	15.571688120250721
2001	17.106339134001015
2002	18.789712382199784
2003	18.376246423974127
2004	17.18517837503218
2005	15.71550376517774
2006	14.553722466028393
2007	18.751796334077984
2008	17.665456720361487
2009	16.995431330068612
2010	12.99455186140374
2011	12.072159841280634
2012	12.32455511010368
2013	12.260602029919406
2014	11.970725567171852
2015	13.786828106151393
2016	14.228421817409567
2017	13.238821964282815
2018	13.348997454818706
2019	14.941512671349436
2020	6.239637534192793