A picture of older baby boomers in 2012:
. 45 percent: Are fully retired.
. 37 percent: Retired earlier than planned.
. 36 percent: Retired when and because they wanted to.
. 63 percent: Have started receiving Social Security benefits.
. 26 percent: Said they have no concerns about retirement.
. 58: Average age of those who said they were fully retired.
. 68.5: Average expected retirement age for those who are still working.
. 79: Average age they say they'll feel old.
Source: MetLife Mature Market Institute, 2012 study, "Transitioning into Retirement"