The National Student Clearinghouse Research Center today released [1] a state-by-state rundown of graduation data, which is based on a broad sample representing about 97 percent of students who attend public and private nonprofit institutions. The report is a companion to a national completion data study [2] the group released last fall. Both are based on students who first enrolled in 2006 at the 3,300 colleges and universities that submit data to the clearinghouse, which is a nonprofit that collects enrollment data and conducts degree verifications.