After dropping more than 1 percent in a year, multicultural student enrollment at Butler University is one-third the national rate at other private, four-year, not-for-profit institutions. Multicultural students—African-Americans, Native Americans, Asian-Americans and other non-Caucasian students—make up 11.3 percent of Butler’s population, down from 12.4 percent last year. On average, multicultural students made up 31.9 percent…