Came here looking for this response.
My follow-up question is "What percentage of the 'totally independent' group, are parents with adult children?"
i.e. there's almost an interesting statistic here about what percentage of adults have "no option" in relying on their parents for financial help, and what percentage of the remainder still do rely on their parents.
But once I had this question, I realized that I needed to be suspicious of the % itself.