Interesting reading.
Crucially it doesn't state if Oxford assisted in placing a graduate (by means of contracts, a word in the right ear, referral, etc) or if the graduate sought employment off of their own bat, somewhat undermining any argument for their careers service.
And unless i'm missing something it is not clear as to if it is the year of graduation or the year they were placed - I suspect the former but purely based on being able to name individual cases where the overall company number is quite small.
I can think of enough friends that found employment themselves having graduated with no further input from Oxford.