How much are people saving for retirement by age?  KCRAHere’s the Average 401(k) Balance of 44-Year-Old Americans (How Do You Compare?)  FinanceBuzzHere’s the Average Retirement Savings of 59-Year-Old Americans (How Do You Compare?)  AOL.comAverage 401(k) Balances in Your 50s: How You Compare and Factors That Influence Your Savings  Yahoo FinanceHere’s the Average 401(k) Balance of 53-Year-Old Americans (How Do You Stack Up?)  AOL.com