From Gallup:
A new analysis of more than 650,000 Gallup-Healthways Well-Being Index interviews conducted in 2008 and 2009 shows that “worry” is a much more common emotion among young and middle-aged Americans than among seniors. Well over a third (37%) of those in their 40s report having experienced worry “a lot of the day yesterday.” This figure drops to about 23% among those in their late 60s and drops further to 15% among those aged 91 and older.

