Migration Policy Institute Migration Policy Migration Policy Institute Migration Policy found Los Angeles One-Fifth of El Salvador Migration Policy Institute found a new study Migration Policy found 1.1 million Salvadoran immigrants one-fifth 94,000 to 465,000 94,000 to 465,000 1.1 million Salvadoran immigrants Salvadorans Los Angeles found One-Fifth of El Salvador Migration Policy Institute One-fifth of the entire population Migration Policy Institute a new study Migration Policy one-fifth found Salvadoran-born immigrants