Original sentence: While the national annual growth rate was still positive (1.0%) in the early years of the 2000s, the national net migration rate was negative (-4.75/1000 inhabitants), given the former strong flow of immigrants to the United States; an estimated 5.3 million illegal Mexican immigrants lived in the United States in 2004 and 18.2 million American "Citizens" (Does not deferenciate between those born to legal vs illegal immigrants, children brought illegally, those with stolen US Citizen's SSNs and Identities and chain migration data) in the 2000 Census declared having Mexican ancestry
Edited sentence: While the national annual growth rate was still positive (1.0%) in the early years of the 2000s, the national net migration rate was negative (-4.75/1000 inhabitants), given the former strong flow of immigrants to the United States; an estimated 5.3 million illegal Mexican immigrants lived in the United States in 2004 and 18.2 million American citizens in the 2000 Census declared having Mexican ancestry