Right now I’m 0% fake, 6% inactive, and 94% active.
But that’s a recent development. Until I locked down my twitter account and began to require approval of people following me, I seemed to get 3 or 4 spam type porn followers a day. My wife saw some of them, and got pissed off because she thought twitter was like facebook and I was actually friends (or otherwise had some interactions) with them.
I would assume anyone who has an open twitter feed would have a high percentage of fake followers. If your a nationally known organization, that’s only going to be higher.