There's a few things there too, consider for every Grenada with one medalist how many small countries have none which can kind of add to that pool of participants.
The other thing is that in most sports each country is limited to the same number of participants. In swimming for example if the US had the 4 of the best 10 swimmers in an event only two get to compete at the Olympics which leaves them at a slight disadvantage.
The other thing is that in most sports each country is limited to the same number of participants. In swimming for example if the US had the 4 of the best 10 swimmers in an event only two get to compete at the Olympics which leaves them at a slight disadvantage.