A somewhat recent update (delayed release) with anonymous survey shows around 50% to be the actual number of admitted dopers. https://www.theguardian.com/sport/

A somewhat recent update (delayed release) with anonymous survey shows around 50% to be the actual number of admitted dopers. https://www.theguardian.com/sport/2017/aug/29/sport-doping-study-revealing-wider-usage-published-after-scandalous-delay https://www.theguardian.com/sport/2017/aug/29/sport-doping-s...