UNCTAD secretariat, on the basis of OECD Main Economic Indicators, May 2013; UNCTAD, The Trade and Development
Report 2013; UNCTAD Review of Maritime Transport, various issues; World Trade Organization (WTO) (table A1a); the
WTO press release 688, 10 April 2013, “World trade 2012, prospects for 2013”. The value of the index measuring growth
in world seaborne trade for 2013 is calculated on the basis of the growth rate forecast by Clarkson Research Services in
Shipping Review and Outlook, spring 2013 (Clarkson Research Services, 2013a).