There is no way to tell actual statistics or logs on a percentage of players getting banned. Instead, look at the formula for how many players get banned for using 'Y' bot for 'X' amount of hours leaving out 'Z' features. So look at what bot is used, how many people use it, how many people have gotten banned, and what additional features (anti-ban, etc) where not used in the ban-rate. If nobody used the anti-ban and got banned, it's clear that you need to use the anti-ban to prevent a ban. Plus, all players bot differently. Somebody may have used maximum anti-ban protection, got banned after 72 hours of continuous botting and another using minimum protection at 2.5 hours a day. It all depends on the bot and the people who use the bot. Make your own justification for a bot, don't ask for a global ban rate as none can be accurate.
If you want a global ban rate, go to every scripting site for Pascal, Java, etc for runescape cheating, look up how many people got banned for each bot, calculate a percentage after a year of searching and there is your answer.