Are there good, reliable statistics anywhere for **percentages of vegetarians in particular countries**?

This would be particularly useful when considering 'vegetarian tourism'. I live in the UK, which I believe has an unusually high proportion of vegetarians, but in several foreign countries I've visited (especially eastern European ones), the vegetarian option is often along the lines of "meat and potatoes without the meat". It would be nice to know where to expect this and where not.

In particular, which countries, percentage-wise, have **most** and **fewest** vegetarians?