This is only people physically coming in, arrivals into the country for the first time.
The overall picture is that of young, working families coming to the U.S. to participate in the labor market.
We've seen a fairly steady growth in the number of undocumented immigrants living here, and this data shows very sizable numbers coming in. We're clearly not stopping them at the border.
The security has done more to keep people from going back to Mexico than it has to keep them from coming in.