According to 2004 figures released by the U.S. Census Bureau, between 9,000 and 15,000 people work at the Census Bureau. 'It is difficult to obtain an accurate figure on Census Bureau employees, because workers frequently move from department to department,' U.S. Census director Charles Kincannon said. 'Also, many supervisors failed to return the mail-in forms that asked them to list how many employees they have.' Kincannon warned all census-bureau employees to take the census-bureau census more seriously, under penalty of law. 