The Pew Research Center report is linked below.
Pew Research Center: Mexican and Salvadoran Views on Life in the U.S.
"Mexicans and Salvadorans share a positive image of the U.S. Many believe that people who move to the U.S. lead a better life, and most of those who have family or friends who migrated say they have accomplished their goals while there."
---Pew Research Center Report