No, not the century before last, this century, in relation to Katrina relief. A report is here, disclaimers apply:

...The Officer said he has friends and family throughout the United States and has traveled here extensively. He admitted his children will be attending the last two years of high school and college in the United States, because they will have more opportunity here. The officer admitted that Mexico only requires its children to attend school until the 6th grade. Many families are so poor they need their children to work to help support the family and the Mexican Government endorses it by allowing 6th graders to stop the education.

The officer agreed with Tully that Mexico is a wealthy nation, has numerous resources, but provides little or no opportunity to Mexican citizens. The officer stated that it is difficult to get Mexicans to work in Mexico even though jobs exist. He said they prefer the United States dollar to the peso, and they find it easier to enter the United States then to live with a lesser wage...