The greater variation in volume per address in the U.S. is probably due to the fact that mail volume and income are highly correlated and the fact that the U.S. has a much larger variation in income per household than France.
Mail volume and income are strongly related.
Mail volume is inversely proportionate to income.
A guy wearing a hat and red clothes is looking at something.
The campsite is far away in a parking lot.
the people are riding bikes through a parking lot
a man is carrying a backpack
They hid behind the wall as the men rode by on donkeys.
A woman in a suit is giving a presentation inside a building.