Your original post stated that most HCV patients are still looking for their next fix. That some are still being infected with the virus does not indicate that the recent additions make up most of the HCV patients. Your citation does not prove 'most'. Your citation simply indicates that in the USA 54% of new cases are IDUs. This does not in anyway indcate that most HCV patients are current IDU users.
Your original point still lacks any support at all.