Historical data tables for the H.3 statistical release are longer available on this webpage as of Tuesday, May 1, 2012. The data contained in the historical tables will continue to be available as preformatted data packages through the Data Download Program. http://www.federalreserve.gov/datadownload/Choose.aspx?rel=H.3 A description of the methods for constructing break factors and seasonal factors is available under "Annual review of break and seasonal factors" on the Federal Reserve's website: http://www.federalreserve.gov/releases/h3/about.htm