What are the ages of living former presidents?

As of the date of this posting (September 1, 2009), the currently living presidents of the United States are:

* Jimmy Carter (October 1, 1924) age 84 * George Bush, Sr. (June 12, 1924) age 85 * Bill Clinton (August 19, 1946) age 63 * George Bush, Jr. (July 6, 1946) age 63 * Barack Obama (August 4, 1961) age 48