DHS Fact Sheet on " Impact of Counting Changes on Nonimmigrant Admissions"
Interpreting recent trends in I-94 nonimmigrant admissions has been complicated by more complete recording of entries into the United States. Beginning in 2005, at selected Southwest border crossings, the Department of Homeland Security installed new technology to record land admissions previously excluded from I-94 data systems; by 2010 this technology was installed at nearly all pedestrian crossings and vehicular lanes along the Southwest and Northern borders.