That's why I said "up to". I saw the range was 1-10%, so I used some weasel-words.
That's an interesting survey, but I do believe it's higher than 1%; surveys are notoriously bad at finding out things that people usually try to hide. I don't think it's quite 10%, though; 3-5% sounds about right to me.
When I was waiting tables, I noticed that gays tend to move to where they're more accepted; there were no gays working in the small town restaurants, but the big cities definitely had their share.