According to the 2010 census, what is the population of the city which boasts the West Montgomery Avenue Historic District?
West Montgomery Avenue Historic District: The West Montgomery Avenue Historic District is a national historic district located at Rockville, Montgomery County, Maryland. Rockville, Maryland:  The 2010 census tabulated Rockville's population at 61,209, making it the third largest incorporated city in Maryland, behind Baltimore and Frederick.
61,209