Walton: Your cash is being counted wellbutrin sr 100mg cost That echoes other findings that show more 20-somethings moving back home with their parents. According to the Network on Transitions to Adulthood, based out of the University of Pennsylvania, the number of 20-somethings living at home has increased by 50 percent since the 1970s. That increase is tied to a 19 percent uptick in parents’ shared housing costs.