Informal statistics from the server log indicate about 15 hits per user on average, so 30 million hits translates to roughly 2 million users.
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 2000 links to HyperPhysics, mostly from educators or educational institutions.