Who Works at Midnight?

Percent of the employed who are on the job at midnight, by occupation...
(shown are the occupations in which 5% or more of the employed are at work at midnight)

Protective service: 16%
Production: 11%
Transportation and material moving: 10%
Healthcare support: 8%
Health care practitioner: 8%
Building and grounds cleaning: 6%
Food preparation and serving: 6%
Computer and mathematical: 5%

Source: Bureau of Labor Statistics, American Time Use Survey