I'll tell you how I calculated it.
Last time I remember immigration had this backlog program, that came about 15 or 16 years ago. At that time they gave permanent residence to everybody who was out of status at that time. For the last 14 to 15 years, no program has come to regularize the status of these so-called undocumented workers.
Now, how do we calculate that? It is based on the number of refugee claims every year. Of the refugee claims, 50%--no, it's more than that--are accepted, but then there are a number of claims.... If there are, let's say, 35,000 refugee claims every year, 10,000 don't get through and hardly 10% will go back. We calculate the number of refugee claims made in the last 15 years, the number that have been turned down, and the number that have gone back. Immigration's removals unit does not have enough manpower to ship people out. It's very difficult because of the manpower availability within CIC.
If you add these numbers, it will come to a minimum of 300,000 people.