In reply to alan chaplin.
Hi Alan
Thanks for your interest.
We recently updated how we report on the Performance Platform. See this blog post for more information and up-to-date links: https://identityassurance.blog.gov.uk/2016/07/08/improving-our-reporting/
For quick reference here's that account usage link (https://www.gov.uk/performance/govuk-verify/account-use) and completion rate (https://www.gov.uk/performance/govuk-verify/completion-rate).