These statistics are highly misleading.
In the San Diego sector last year ICE apprehended only one non criminal related undocumented alien and the officer who did it received a reprimand.
As long as there is no criminal connection ICE is not looking for aliens, and there was one DUer who said that he was tired of the tension and wrote ICE to turn himself in for overstaying his student visa. ICE said that they didn't have any resources to pursue his case.
ICE has multi agency task forces that are targeting gangs with significant success, see this;
http://cis.org/ImmigrantGangsIn following suspected gang members in immigrant gangs ICE finds illegal aliens that 'have no visible means of support'. These are folks that have a lavish standard of living but don't go to work and ties to known drug networks. These aliens have no criminal convictions but are identified and deported on strong suspicion of being involved in criminal activity.
The other number that distorts deportation statistics are those that are caught near the border. It had been the practice to allow aliens to volunteer for a quick repatriation and their name would be entered into the data base and they would be walked back to the border for a voluntary 'self' return. These people would not be counted in deportation statistics.
Now a much higher percentage are taken into the system, provided an attorney and take to court. Typically the process takes 3-4 days and they are returned. These people are now included in deportation statistics but really are fence jumpers that have been included in the system where previously they were not.
Just taking 'top of the page' statistics on deportations will give a very distorted view of the very significant changes that the new administration has implemented, eliminating the Bush's penchant for high profile sweeps into neighborhoods to pick up undocumented workers who had no other criminal activity and are simply undocumented on their immigration status.