The files below contain estimates of net stocks, depreciation, and average ages for the years 1925-1999. Estimates for investment are available for the years 1901-1999. Also provided are unpublished detailed estimates by industry and by type of equipment or structure. The decimal point is included in the data field.
Average ages are in years.
The data are stored in Microsoft Excel spreadsheets. If you have Excel installed on your machine, clicking on the XLS link may open the spreadsheet in your browser. Users interested in the detailed industry by asset data should click here to get to that section of the page. Introductory and explanatory information, including methodology and definitions, can be found here . Standard estimates of net stocks, average age, depreciation, and investment.