Note to Users of Historical Statistics

To obtain accurate historical statistics for 1984--92, use only the detailed statistical tables in this report and not those published earlier. Current-year (1994) and immediate prior-year (1993) statistics in trend tables were derived from the most recently completed survey cycle. Data for previous years were reviewed for consistency with current-year responses and may have been revised. Consequently, this report contains the latest revised statistics from the Survey of Industrial Research and Development for 1984--94. Note particularly that, as a result of a new sample design, statistics for 1988--91 have been revised since originally published. These statistics now better reflect R&D performance among firms in the nonmanufacturing industries and small firms in all industries. See the technical notes in section B for more information.

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