As I’ve noted before, the immigrant population (45 million) in the U.S. has gradually become more similar in socio-economic profile to that of the 283 million natural born citizens. The gradual melding includes a decline in the unauthorized population, notwithstanding the Mexican border crisis.
The following is from the Center for Migration Studies: An estimated 10.35 million undocumented [I use unauthorized] immigrants resided in the United States in 2019 compared to 11.73 million in 2010. Thus, between 2010 and 2019, the undocumented population in the United States declined by 1.4 million, or 12%. This trend is primarily driven by Mexican nationals voluntarily leaving the United States.
The percentage of undocumented immigrants that has lived in the United States for 15 years or more increased from 25% to 43% between 2010 and 2019.
CMS estimates that:
38% of undocumented immigrants are parents of US citizens,
16% are married to a US citizen or lawful permanent resident (LPR), and 96% of those in the labor force are employed.
20% of the US undocumented population lives at or below the poverty threshold, and
50% does not have health insurance.
From the Center for Migration Studies here and here.