"The area where 401(k) participants say they could most use help is understanding how much they'll need to save for retirement ... Over two thirds (68%) of participants gave an estimate of how long their retirement savings will last, with the average being 24 years. The remaining 32% say they do not know how many years their retirement savings might last ... [P]articipants expect 44% of [their retirement income] to come from a 401(k). The remaining 56% is expected to come from a range of different sources." [Also available: Summary of survey results (14 presentation slides)]