Ivan,
generally colleges do not provide information on how many students go into the industry itself publicly, although they obviously gather it themselves. This applies across all courses.
course outlines will tell when courses started (all within the past few years) and in general new courses initially cap their numbers at a relatively low level as they gear up and make sure they get the resources in place. The longest running game specific courses have to be carlow, letterkenny and BCFE so we can just ask here on the boards.
Aphra.