Here is the previous post on marketable Treasury maturity:
http://energyecon.blogspot.com/2008/11/worlds-biggest-arm.html
Marginally attached workers are persons who currently are neither working nor looking for work but indicate that they want and are available for a job and have looked for work sometime in the recent past. Discouraged workers, a subset of the marginally attached, have given a job-market related reason for not looking currently for a job. Persons employed part time for economic reasons are those who want and are available for full-time work but have had to settle for a part-time schedule. For more information, see "BLS introduces new range of alternative unemployment measures," in the October 1995 issue of the Monthly Labor Review. Updated population controls are introduced annually with the release of January data.
Also, it seemed to me a normalized view of the debt structure would be informative. Here is the percentage of the Treasury marketable debt for each component over the time series. Again, interesting trends emerge - the relative proportion of T Bills was falling in the October report 2002-2007 s total debt was steadily climbing - until 2008, with an explosion of short term debt.
(NB: The Treasury debt under consideration is the Marketable category, which the debt held by the public, other CB's etc. Hat tip to PeakVT for pointing that out. Also, some graph improvements done for today's post courtesy of Mel and Comrade Counterpointer's suggestion.)
(Addendum: MLM clarification - we are at a tipping point, some external event is needed to trigger the change from a 'status quo' approach to rollover in the Treasury market - then lookout.)