Thank you, Chair.
That could be an arbitrary number, obviously, but the reason I suggest that is there are individuals who might enter this country and disappear for a time, with no activities and no travel back and forth or whatever, and their activities and their movements would be great to have because they could become involved in criminal activity, terrorist activity, in subsequent years and we could lose it. I do know from experience on criminal matters that in even some of our minor files we have record retention schedules of 10 or 15 years, and individuals may be silent in those years and we lose them permanently. They're gone and you can't ever access them again and it's critical that sometimes that information comes up.
I know we need a reasonableness balance here, but 15 years doesn't really allow us enough time and I see at the other end it's too much time. If someone comes into the country at age 20 years or 16 years, and we have a 40-year span, we hope that by the time they're 60 or 70 they're going to have demonstrated themselves already to be a risk to our country.