[7] Fonti di dati: Institute of Shipping Economics and Logistics (ISL) Brema, Yearbook and various issues of FOCUS 1999, ISL Merchant Fleet Data Base (valori aggregati basati su aggiornamenti trimestrali del LMIS); Institute of Shipping Analysis (ISA), Gothenburg; Prontuario di statistiche della DG TREN.
[7] Sources d'informations: Institute of Shipping Economics and Logistics (ISL) Brême, Yearbook et plusieurs livraisons de FOCUS 1999, ISL Merchant Fleet Data Base (données agrégées fondées sur les mises à jour trimestrielles fournies par LMIS); Institute of Shipping Analysis (ISA), Göteborg; DG Énergie et transport, Statistics Pocket Book.