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General Notes

Data presented here are derived from the annual National Science Foundation/National Institutes of Health Survey of Graduate Students and Postdoctorates in Science and Engineering. Unless otherwise specified, data published here represent estimates of total graduate enrollment in science, engineering, and selected health fields in 12,629 graduate units (departments, research centers, degree-granting programs and health facilities) at 582 institutions in the United States and outlying areas as of fall 2007.

The survey was refined in 2007 to improve reporting: new fields were added, and some fields were reclassified. Because of these changes, current-year data are presented two ways in multi-year tables

• "2007new" shows the data as collected using the new methodology
• "2007old" shows the data as it would have been collected in prior years

All rankings using 2007 data were done using the "2007new" data.

Appendix A, Technical Notes, provides detailed information on these changes.

Collection of graduate enrollment and postdoctoral employment data began in 1966, and the survey has been modified periodically since its inception. Only the latest data for prior years published in this report should be used in historical analyses.

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