In what countries, besides USA, is Masters Swimming "big"? Now, it's very difficult to define excatly what I mean by masters swimming being "big" but let's define it like this:
1. An arbitrarily chosen city with a population of more than 100,000 in the particular country would be likely to have a masters team with at least 10 members.
2. Annually there should be at least 5 masters swim meet being held in the country.
So basically, if I reside in the particular country in a not too small city, I'd be likely to be able to join a masters team and compete without having to travel abroad.