The University of Michigan was ranked as the top U.S. public university in the latest QS World University Rankings for 2016, moving ahead of the University of California, Berkeley and the University of California, Los Angeles.

U-M ranked 23rd overall among more than 900 colleges and universities in the world, up seven spots from last year. The ranking was released Tuesday.

The QS World University Rankings, launched in 2004, are based on six factors: academic reputation, employer reputation, student-faculty ratio, citations per faculty, proportion of international faculty and proportion of international students.

The United States had the most universities of any nation on the list, accounting for almost a third of the top 100 positions in the ranking.