>Bangladesh was part of Pakistan.

is there a brit in the crowd who can explain this?

now, compare it to russia with the same population....

1. gender ration, not sex.
2. counting the foreign workers is not correct. many of them have families abroad, and are there only to work, not to create a new family with a local woman.
3. I'm pretty sure most countries have laws forbidding such relationships, but even if there are lucky men who started a family with a local women, they are just a blip in the data.

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you should do this with only citizens, not all residents.