Original sentence: A population study from July 2006 to March 2007 found that the city gained 32,000 people during that seven month time frame, bringing its population to 255,000, or 56% of its pre-Katrina population
Edited sentence: A population study from July 2006 to March 2007 found that the city's population shot up 14 percent during that seven month time frame (an addition of about 4,500 to 5,000 people per month), bringing its population to 255,000, or 56% of its pre-Katrina population