Sorry to see nobody ever answered your question !
A survey from Owlet Baby Care found that nearly half of all parents with children six months or younger get just one to three hours of uninterrupted sleep a night.
Another study says On average, new parents get four hours and 44 minutes of sleep every night during baby’s first year. They spend almost an hour every day trying to lull them to sleep, and pace the equivalent of two miles every day until baby drops off. That’s the equivalent of 730 miles over a whole year!
Personally I think it differs per child.