Retirement chart origin.
The bumph in the preamble states that a Dr. Ephrem Cheng derived the chart with the study group being retirees of Boeing Aerospace, the data being provided by actual pension payments deposited in the retirees' bank accounts plotted as a function of age.
The impetus for the study - the bumph goes on to state, was that retirement funds with Lucent technologies, AT+T, Lockheed-Martin and others weren't drawing down as expected because retirees weren't living long enough to take out the expected sums.
The study was presented as a lecture in 2002.