http://cepii.fr/anglaisgraph/bdd/chelem/internatrade/10br.txt
International Trade Sectoral Nomenclature CHELEM
B Construction Products BA + BB + BC
C Basic metals CA+ CB + CC
D Textiles DA + ... + DE
E Wood Paper EA + ... + EE
F Metal Products FA + ... + FW
G Chemicals GA + ... + GI
H Mining HA + HB + HC
I Energy IA + IB + IC + IG + IH + II
J Agriculture JA + JB + JC
K Food Products KA + ... + KI