That's a substantial load on the Anglesey flights. Assuming, as seems reasonable, that the route has traffic generation biased from the Anglesey end it would seem to indicate that the morning flights down to Cardiff and the evening flights back must be mostly full, particularly Monday down and Thursday/Friday back.
It is normally difficult to get anywhere near 75% overall load factor long-term on a business-oriented route, as opposed to an IT to Palma, as your best paying passengers in this market are the last minute ones who will eventually go elsewhere if they find they can't get a seat when they need one. Also they all tend to want to travel at the same time. Highland should be thinking of putting their ATR on the route with such figures, assuming all are revenue. Not certain how much they have their hands tied commercially with the arrangement with the Welsh Assembly.