Sometimes numbers do lie.
I'm an FAA ATP, and I account for 1 of those numbers on the blue bars. So do my colleagues that also did their checkrides over the past 8 years. None of us holding a working visa, so, as unrestricted ATP holders we should not be accounted as supply.
(I know someone will ask why we obtain a FAA ATP then. Some regulations are so messed up in a way that you'll only get the job if you hold an FAA ATPL, since the country's aviation authority can't back up a single license they've issued, as they might be even completely fake. Other than that, ratings do not expire. And yet, having one helps if you already have it)