LIVING WITH THE PARENTS

I read in the Eurostat site a statistic about the pourcentage of young adults 25-34 years old who are still leaving with their parents. Portugal comes as one of. The first (or the last...) with an astonishing 47.6%. But there's worse, like Bulgaria (the champion. The Nordic countries and UK have the lowest numbers. The average for the EU is 32%.
I'm sure there are ponderous economic reasons. But one wonders about the culture that can make a 34 year-old live happily with mum and dad.