Year	% of total exports
2002	3.880488295492595
2003	4.048872833279326
2004	3.8582661303680856
2005	3.815443615423978
2006	3.779964956432981
2007	3.419599920270053
2009	3.806016413736673
2010	3.433572609903019
2011	3.2910882065382028
2012	3.3646892463457894
2013	3.407676784175663
2014	3.4944922522081394
2015	2.4952425210700895
2016	2.3241731871260924
2017	2.3043919393875223
2018	2.2859733936207047
2019	2.396244922529443
2020	1.7997783623027779