Help

Throughout this site, the source data for the figures and tables presented are available for viewing and downloading. If you are interested in doing additional analysis of any available data, you are encouraged to download the data files to work with the data. 

Source data files are provided as Excel spreadsheets. Tables are also provided in Portable Document Format (PDF).

Links to files for download are on the same page as the figure or table, and are identified by the Excel or PDF icon.  

Plugins:

• Acrobat Reader (.pdf)
• Excel Viewer 2003 (.xls)
• PowerPoint Viewer 2003 (.ppt)

For additional information and questions, please check the NSF Help Center or contact us.