Worth keeping in mind that the typical measure of the home ownership rate is really a measure of the proportion of people living in a home with the owner. So a 25 year old living with parents counts towards and not against this. Likewise anyone else sharing the house (boarders, etc). I suspect that the number of people in this situation has increased in the past couple of decades due to housing affordability.
The numerator is some multiplication of people and houses and people per houses though, with the houses and people counted differently on each multiplier though, so it still matters
