A cup of Joe helps in keeping the nation's workers: particularly the younger ones: productive and energetic, according to a survey commissioned by CareerBuilder and Dunkin' Donuts. Thirty-two percent of workers say they need coffee to get through the workday. Forty-three percent of coffee drinkers report they are less productive if they don't drink coffee while on the job.

The survey polled 3,600 workers nationwide to determine the latest coffee consumption trends brewing in the workplace. Those professions that most need coffee to stay productive:

  • Nurses
  • Physicians
  • Hotel workers
  • Designers/architects
  • Financial/insurance sales representatives
  • Food preparers
  • Engineers
  • Teachers
  • Marketing/Public relations professionals
  • Scientists
  • Machine operators
  • Government workers

Other survey findings:

  • More than two-in-five workers claim they are less productive without coffee. Geographically, workers in the Northeast U.S. are the most dependent on coffee, with 48% of people claiming they are less productive without coffee, compared with the South at 45%, West at 44%, and Midwest at 34%.
  • Younger workers are more dependent on coffee. Forty percent of workers aged 18 to 24 admit they can't concentrate as well without coffee. Forty-three percent of workers aged 18 to 24 say they have lower energy if they don't drink coffee.
  • Thirty seven percent of workers drink two or more cups of coffee during their workday.
  • Twenty-four percent of workers aged 18 to 34 buy coffee as a way to treat themselves for a job well done.

Today's workforce is working longer hours and shouldering heavier workloads, says CareerBuilder. The survey shows having an extra boost in the morning and throughout the day may be helping productivity levels.