Almost a third of U.S. private colleges expect freshman enrollment to decline in the 2009-2010 school year as families struggle to pay bills and hold down debt, according to a survey. Fourteen percent of schools surveyed from May 18 to June 19 predicted new undergraduate student enrollment would fall more than 5 percent, the National Association of Independent Colleges & Universities, a Washington trade group, said today in a statement. Forty-four percent of the schools said tuition deposits for the semester that starts in September declined from a year ago.