"According to U.S. Census estimates, Baltimore led all American cities in population loss for the last two years running. Census figures indicate the city saw more people leave its boundaries than Chicago, which also reported significant losses, even though Baltimore is only a quarter of its size." --AP, quoted at Surber
What AP "forgot" to mention is the 2015 riots in Baltimore--and the Mayor-ette's "stand down" order issued to the police department.
Surber makes it clear--clear enough for even Tom Barrett: when police functions cease, people get the Hell out of Dodge.