That is a new way of reporting news, that journalist Gortázar seems to have invented here. When you don't know anything about the victim, just make something up from "statistics".
Where else can we apply this technique?
"Maria entered their lives around 1971 — the year Henry Kissinger visited China, John Lennon wrote Imagine, and Mexico hosted the first Women’s World Cup."
Good to know.
"The traditional maid’s room is gradually disappearing in Brazil, but buildings with separate social and service elevators — for domestic workers, visiting technicians, neighbors with dogs, or residents carrying groceries — remain commonplace."
Those are for separating workers carrying broken dusty floor tiles or ladders or a bunch of fiber cables from the other people using the building.
Anyway, ignoring the lacking quality of the journalism, more countries should do like Brazil and call slavery for what it is in legislation, instead of using euphemisms like "human trafficking".
This lady is in her 60s, does she even know any other way to even live? Life with that family may be better than whatever Brazil's equivalent of welfare shelters are.
Seems like that may have been why the case workers left her with that family for now.
What the fuck?
Why did the law need the family's "agreement"??
Why is nobody going to jail for imprisoning someone for 55 years??