The Leading Question, a music industry research group, conducted a survey of 600 music fans who also own computers and mobile phones. the results?

"those who regularly download or share unlicensed music also spend an average of £5.52 a month on legal downloads through sites such as Apple's iTunes Music Store or Napster. Those who were not illegally filesharing spent just £1.27 a month on digital tracks.
http://arts.guardian.co.uk/news/stor...536886,00.html