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 / Updated  / Source: NBC News

Mamas, don't let your babies grow up to be newspaper reporters. Or lumberjacks, or firefighters.

All three ranked among the 10 worst jobs of 2015, among 200 considered, according to a new report from job site The annual assessment factors in data from several metrics: environment (including physical demands, hazards and proximity to danger), income (average beginning, midcareer and top incomes), outlook (unemployment data as well as potential employment and salary growth) and stress (including deadlines, competitiveness and how often your life is at risk).

"There are a lot of areas where we can get very good data," said CareerCast publisher Tony Lee. "Because we have so many criteria, no one criterion stands out as being the most heavily weighted."

Common factors among the worst careers include poor employment outlooks, low pay and a proximity to danger. A common thread among the best jobs? Math, said Lee. One such career, data scientist, debuted on the list this year as the sixth-best job. High-rated jobs also tend to have better salaries, less stress and a great employment outlook.

Based on CareerCast's rankings, these are the five best and five worst jobs of 2015.

Five Best Jobs:

  • Actuary
  • Audiologist
  • Mathematician
  • Statistician
  • Biomedical engineer

Five Worst Jobs:

  • Broadcaster
  • Cook
  • Enlisted military personnel
  • Lumberjack
  • Newspaper reporter

More from CNBC:

-- Kelli B. Grant