I would echo the same general comment, that information really should only be retained for the period of time it's required. It's a little difficult to understand why entry and exit data would have any value 50 or 75 years after the event.
One example I like to use is CBSA. Most organizations are required to maintain tax records for seven or eight years, and beyond that even the financial aspects of individuals and companies are primarily considered irrelevant.
Certainly that's a good topic for negotiation with the Privacy Commissioner, and I'd like to see it reasonably short, also realizing there's a cost to maintaining that information.