Over the next decade, more students of color than ever before will pass through the gates of the nation's colleges and join the ranks of its work force, according to new projections by the Western Interstate Commission for Higher Education. By the year 2020, minority students will account for 45 percent of the nation's public high-school graduates, up from 38 percent in 2009. In short, the number of white and black graduates will decline, and the number of Hispanic and Asian-American/Pacific Islander graduates will rise significantly. Those projections appear in the latest edition of "Knocking at the College Door," a regular report on demographic change published by the commission, which is known as Wiche. The updated report includes national, regional, and state-by-state projections for graduates of public and private high schools through 2027-28, revealing the enrollment challenges colleges must adapt to. "Knocking at the College Door" has long been a touchstone for those who recruit students. Rich in data, it portends a future that both inspires and worries enrollment officials, who must chart short- and long-term courses for their institutions.