Unfortunately this isn't a good way to tell how many are "real" users. Many have multiple accounts for various reasons including mining. There are also users that have created 1000's of accounts for sale or bots.
I haven't been around for a couple months but someone used to post statistics on daily users. I need to find it. :)
I think you are looking for this guy ^^ https://steemit.com/@elyaque
Thanks!