Here's the ranking of workers most dependent on coffee, published on WebMd:
3. Hotel workers
5. Financial/Insurance sales representatives
6. Food preparers
9. Marketing/Public relations professionals
11. Machine operators
12. Government workers
Researchers found workers in the Northeast were the most dependent on coffee, with 48% saying they were less productive without it compared with a low of 34% of workers in the Midwest that said the same.
This program aired on September 28, 2010. The audio for this program is not available.