Corrections

A correction is any change to a published figure, definition, or conclusion that would have altered a reader's decision. Formatting, wording, and new content are not corrections and are not logged here.

Report an error through the contact page with the page URL and the figure in question. We aim to acknowledge within two business days. Material errors are corrected immediately on discovery, with a dated entry below; the superseded observation stays in the underlying series so past values remain reconstructable.