That's already been disproved elsewhere especially re. Trinity Mirror Group - its matter of record. All of our media were using the same sources.
Might be best to assume that our entire UK population were affected by this and work backwards from there possibly allowing for the fact that the majority of the population don't seem to give a shit about News International issues being more concerned about jobs, housing , rising fuel costs etc.
See here also:
According to BBC Radio 4's The Report, the files from Operation Motorman, which was run by the Information Commissioner's Office in 2003, were requested three months ago.
'12,000 victims'
They contain 4,000 requests from 300 journalists and 31 publications for confidential information from a private investigator, which in many cases had been obtained illegally.
The investigation found the Daily Mail had made the most requests, followed by the Sunday People and the Daily Mirror.
http://www.bbc.co.uk/news/uk-14222771