It is true that these statistics are very old, but I think the main trends are the same.
I'm sure there are a lot of people applying for internships related to external relations like relex, development, humanitarian aid or enlargement.
And I know for sure from a guest lecturer we've had who is working for the Commission that for example the dg budget is still one of the less popular choices, in his words: 'no one is applying for dg budget'. Too bad my academic background has nothing to do with budget, so I didn't choose that one either.