I wouldn't use these stats as a measure of competitiveness (hope i spelled that right). If no students were accepted that term there is a strong possibility that simply noone applied for a spot there. This isnt always the case, but I haven't met to many disapointed clinical year students.
Honestly, I wouldn't worry to much about where you do your clinical year until you approach it. The affiliations change as does your feeling on the matter.
E.G. You might meet a great visiting professor, find a speciality you really enjoy, etc.
all the best
The way we humans treat animals and other fellow earthlings says a lot about the society we live in: "It's a matter of taking the side of the weak against the strong, something the best people have always done."
- H.B.S.