Baltimore Mayor Martin O?Malley intends to appeal U.S. Census Bureau data that indicates Baltimore City residents are leaving the city at a rate of about 500 people per month, his spokeswoman said Wednesday.

“We believe we?ve stemmed the tide of population loss we?ve seen in the 1990s,” said Raquel Guillory. The city also challenged Census data in 2001, 2003 and 2004.