why would they mention it ??? it's obvious to any decent human.you start wearing shorts on airplanes , you end up next year wearing your bathing suit , our your sleeping pyjamas.
like for any country, numbers are not publicly published ,they exist but stay secret . otherwise it would be too easy to reach and match . so they just ask your numbers in subtile way , like checking your and her bank statements for the previous last 3 or 4 or 6 months , then compare compare with the official requirements . from what I know those numbers are quite high.