From this:

A report from a Mexican government agency released today says the number of Mexicans entering the U.S. illegally increased by 66 percent from 1990 to 2002.

According to the German news agency Deutsche Presse-Agentur, the study was conducted by the National Population Council, or Conapo. It found the number of illegals coming from Mexico each year now exceeds 1 million. The report says about one-third of those who enter illegally, 390,000 annually, achieve their goal of staying in the U.S.

Deutsche Presse-Agentur reports the number of Mexicans living in the United States went from 4.3 million in 1994 to 9.5 million in 2002, according to U.S. estimates.

It is estimated Mexicans in the U.S. sent approximately $12 billion back to Mexico last year...