According to a Congressional Research Service report on unemployment and older workers, "the percentage of Americans who report unemployment compensation income declines from 5.1% for ages 35-44 to 1.0% by ages 65-69." (p.19)
U.S. Congressional Research Service. The Library of Congress: Issues in Aging: Unemployment and Older Workers (RL32757; Jan. 31, 2005), by Julie Whittaker. Text in CRS Web. Retrieved September 10, 2006, from http://www.opencrs.com/rpts/RL32757_20050131.pdf
"This report examines how unemployment has a different impact on the older worker. As workers age, negative--but previously temporary--events such as unemployment may push otherwise firmly entrenched workers out of the labor force. While older workers are less likely than others to experience a spell of unemployment, those older workers who do experience unemployment have a higher incidence of withdrawing from the labor market."