Contact

Use the form below to reach the team. We read every message that is not spam, and a report of a wrong figure is the most useful thing you can send.

Why a Form and Not an Email Address

A public email address collects spam and phishing within days. The form below goes straight to the people who run the register, and it carries a spam check that costs you a moment and costs a bot real computing time.

What to Write to Us About

• Corrections. Tell us the page, the figure and the source that shows it is wrong. Records are append-only, so a fix appears as a new dated entry.
• Business. Partnerships, data, and questions about how commercial links work.
• Press. Questions from journalists and researchers.
• Privacy. Anything about the message you send here or your data on this site.

Send a Message

What Happens to Your Message

We use your message and the optional name and email only to read it and to reply. It is stored in a private tracker that only the team can open, and we do not sell it or add you to any list. Ask us to delete it by writing again with the topic Privacy. Please do not send passwords, payment details or identity documents.