Revision History for Fact Sheet 2009-3008 Grecia R. Matos Minerals Use in the United States from 1900 through 2006 ----------------------------------------------------- Posted online April 21, 2009 ----------------------------------------------------- Revised and reposted May 11, 2009 The pdf of the fact sheet was modified: In table 1, to change the units of measurement to thousand metric tons and to add an explanation for "--, negliglble or no data" and to change all data by reducing by a magnitude of 1,000 and rounding to three significant digits.