In honor of National Coffee Day, celebrated this year on Sept. 29, Canton, Mass.-based Dunkin’ Donuts and Chicago-based CareerBuilder conducted a survey to determine the latest coffee consumption trends in the work place. The survey was conducted from Aug. 13 to Sept. 6 and included more than 4,100 workers nationwide.

The survey results show that coffee plays a major role in helping professionals perk up at work, as 43 percent of those who drink coffee claim they are less productive without a cup of Joe.

According to the results, the professions with the highest proportions of workers stating they are less productive without coffee vary widely. The following are those who report they need coffee to get through the workday the most:

1. Food preparation/service workers
2. Scientists
3. Sales representatives
4. Marketing/public relations professionals
5. Nurses (nurse, nurse practitioner or physician assistant)
6. Editors/writers/media workers
7. Business executives
8. Teachers/instructors (kindergarten through 12th grade)
9. Engineering technicians/support
10. IT managers/network administrators

The survey also found that 63 percent of workers who drink coffee actually drink two cups or more each workday, while 28 percent drink three cups or more. Additional findings were a majority of younger workers need coffee for energy and motivation, as 62 percent of workers aged 18 to 24 say they are less productive without coffee, with 58 percent of workers aged 25 to 34 making the same claim; 55 percent of workers claim to drink at least one cup of coffee each workday; geographically, 64 percent of workers in the Northeast drink at least one cup a day, compared with the South at 54 percent and the Midwest and West at 51 percent; overall, 43 percent of workers who drink coffee claim they are less productive without their cup of Joe; and 47 percent of female workers claim they are less productive without coffee, compared with 40 percent of male workers.

"On National Coffee Day, we celebrate the important and unique role coffee plays as a vital part of our daily lives,” said John Costello, chief global marketing and innovation officer at Dunkin’ Brands, in a statement. “As these survey results show, coffee continues to become more and more essential in the workplace in particular, helping workers across all professions stay productive throughout the workday.”

"There's a reason why coffee is a staple in the workplace,” added Cynthia McIntyre, vice president of marketing and communications at CareerBuilder, in a statement. “Workers report that coffee fuels higher energy and productivity and serves as a means to socialize with colleagues."