Coverage follows the data. An area is shown only while its source figures are current enough to publish. Areas appear and disappear between visits for that reason, and an area with nothing publishable is omitted rather than shown blank or zeroed.
“As of” means the data, not the page. Each date is the end of the period the figure describes, as published by the source. It is not the time the page was loaded or the time the figure was retrieved. Where a card carries several figures, the date shown is the oldest of them, so it is true of every number on that card.
Dates are calendar dates. Period ends are published as dates rather than instants and are displayed as-is, without a timezone conversion that could shift them by a day.
Figures are cached briefly. The market page holds a copy for up to ten minutes. That affects only how quickly a new release appears — it never changes the period a figure describes.
Nothing is carried forward silently. If a source stops publishing, the last real figure keeps its own original date and is flagged as overdue once it passes the threshold listed for that source above. A stale number is never redated to today.
