The hit rate reached about 50 million file hits per year in the fifth year and logging was suspended. Informal statistics from the server log indicate about 15 hits per user on average, so 50 million hits translates to over 3 million users per year.
Email traffic has increased proportionately, and an informal tally of the emails indicates the following frequency of users.
- High school teachers.
- Engineering and technical personnel in industry.
- Independent learners.
Search engines give over 70,000 links to HyperPhysics, mostly from educators or educational institutions.