Corrections

How it works

• Tell us through the contact form: say which page has the mistake and, if you can, the correct source.
• We check it against the official source or by redoing the calculation.
• If it’s a mistake, we fix it and log it below: the date, the page, what it said before and what it says now.
• Updates aren’t corrections. When an agency publishes new data (new population estimates, new boundaries), we update it and note the new data version below.

Published corrections

No corrections yet: when there are, they’ll appear here, newest first.

Data versions

The official data the tools use, with the version date. Each source is described in our methodology.