That's not my fault,
Sorry, it is only your fault because you are not able to read your own link properly:
it didn't mention the metropolitan area it said PhiladelphiaAccording to the Bureau of Economic Analysis, the Philadelphia area had a total gross metropolitanproduct of $347 billion in 2010, the seventh-largest metropolitan economy in the United States.
And i knew the metro population and where it begins and ends way before you looked it up on your little computer. You've never even actually been here.
If you knew it, why didn`t you write about it from the very beginning?