The QS rankings use peer review data collected (in 2016) from 74,651 scholars and academics and 37,781 recruiters. These two indicators are worth 40 percent and 10 percent of a university's possible score respectively. The QS rankings also incorporate citation per faculty member data from Scopus, faculty/student ratios, and international staff and student numbers. The citations and faculty/student measures are worth 20 percent of an institution's total possible score and the international staff and student data five percent each. QS has published online material about its methodology.