Mortgage/rent costs

I'm just curious what people pay as a percentage of their income to their mortgage or their rent every month? I know much as depends on how cheap your home is as how high your income is, but I just wondered if, especially on the DFW forum, whether there are any patterns.

I'm at around 10% of income, but that's down to having a very low mortgage rather than a high income (for instance I pay a further almost 10% of my income to a student loan every month so it all evens out I guess overall).

Just comes from curiousity as a friend has a mortgage of about 35/40% of income (we are on the same income). I certainly couldn't stretch to that with my numbers, but I'm curious what others have. Perhaps I am being unduly nervous. Hopefully with a % it might make people more confident to post if they don't like mentioning £s. But you're welcome to do that too if you prefer (it's DFW after all some of you are very open!).