If I might comment on that, there is a great interest from the airline companies in using the data for commercial and marketing and data mining purposes.
That was made very clear to me a couple of years ago when I was at an International Civil Aviation Organization seminar in Montreal on this question. At this seminar the representative of IATA, the airline trade association, came before the assembled governmental representatives and said that they, as airlines, would be happy to collect whatever data governments would like them to collect as long as, one, they were reimbursed for their costs in collecting it, and two, having passed the data on to government, they got a free ride to keep and use the data themselves for commercial and marketing purposes.
There is, in fact, at least in the U.S., an entire industry of third party data mining and data analysis companies that look at these PNR data for a variety of commercial, marketing, and operational purposes for the airlines.