:::::This is from a 2013 Scottish Government report on where Scotland would have ranked in 2011, if it's GDP was measured independently: 
 ::::::When an illustrative geographic share of North Sea (extra regio) output is included in Scottish Gross Domestic Product (GDP), it is estimated that Scotland would be ranked 8th against the 34 OECD member countries, with regards to GDP per capita in 2011. 
 :::::I guess someone has taken this report and used it as reference for saying "8th", instead of the current GDP.