General statistics do prompt some odd thoughts...
"67 per cent of spies have been civilians; 37 per cent had no security clearance;" - So your secrets can be stolen by people who shouldn't have access to them?
"84 per cent of spies were successful;" - Can you be called a spy if you haven't successfully done any spying?
"67 per cent volunteered to commit espionage; 81 per cent received no money for their services;" - Were 48% trying to improve the 'voluntary service' section of their resume?
"94 per cent went to prison" - That's a pretty good prosecution rate, but did you count the ones that weren't caught? Do you have any idea how many weren't caught?