What percentage of restaurants use guest paging systems?

by thosch66
Question by : What percentage of restaurants use guest paging systems?
I want to know roughly what percentage of all restaurants use these. Not which ones use them, not how many restaurants there are in the world, but what percentage of restaurants use the guest paging systems that vibrate and/or make noise when a guest's table is ready.

Thank you.
Please reference a link showing where your answer came from. Otherwise, I'll have to assume you made it up.


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Starting Baby on Solids