I have posted on this recently and I am doing this again, in light of the impending legislative battle over the fate of unauthorized persons in the U.S.
In 2016, about two-thirds of unauthorized immigrant adults had lived in the U.S. for more than a decade, and the share has risen from less than half (41%) in 2007. 80% of unauthorized persons from Mexico had been in the U.S. for at least ten years
Only 18% of all unauthorized persons have lived in the U.S. for five years or less, a decline from 30% in 2007.
These are 2016 estimates. The percentage of unauthorized immigrant adults today who have been here more than ten years had certainly increased since then.