Country with the most finishers in the top ten of each race combined:
USA-5
Ethiopia-3
Kenya-2
Bahrain-2*
All others-1
Even if we combine Kenya and Bahrain, since their two finishers are from Kenya, USA still comes out on top.
We all know the depth of the east African's blows the doors off the USA's. But it's certainly promising to see this many US runners on or near the podium.