In 2012, US Border Patrol Agents at the border of Arizona and Mexico arrested 126,500 migrants who were attempting to enter the United States illegally from Mexico. The number of captures was 78 percent lower than the 577,000 migrants apprehended in 2005.
Between 2005 to 2012, the United States Government increased its security personnel in the Southwest. The number of Border Patrol agents in the region doubled during the time frame to over 18,000 agents. The Customs and Border Patrol Agency also increased its air fleet, where it has over 260 aircraft operating in 2012.
Border Security Officials in the US state that most migrants in 2012 rarely attempt to cross the border without the hiring a human smuggler.
Source: Julia Preston, “Arizona Border Quiets After Gains in Security,” New York Times, March 15, 2013.