Source: Worldbank.org "Connecting to Compete 2012" http://siteresources.worldbank.org/TRADE/Resources/239070-1336654966193/LPI_2012_final.pdf
Allikas: Worldbank.org "Connecting to Compete 2012" http://siteresources.worldbank.org/TRADE/Resources/239070-1336654966193/LPI_2012_final.pdf