Original sentence: 's population shot up 14 percent during the seven months after the Census Bureau's population count which brings the city's population to 255,000 or more than half of pre-Katrina residents
Edited sentence: 's population shot up 14 percent (or about an addtional 5,000 people per month) during the seven months after the Census Bureau's population count which brings the city's population to 255,000 or more than half of pre-Katrina residents