And now, the latest trends with benefits.

Hourly workers are significantly less satisfied than their salaried counterparts on factors like money earned, vacation time, retirement plans, physical safety conditions and employer-provided health insurance benefits, according to a recent Gallup poll. Other measures on which fewer hourly workers were “completely satisfied”: job security, promotion chances and recognition received for work accomplishments.

The largest disparities in happiness came on vacation time (65% to 50%) and retirement (48% to 34%). Forty-one percent of salaried workers indicated satisfaction with the amount of money they earned, in contrast to 29% of hourly workers.

Meanwhile, comparable proportions of both salaried and hourly workers said they were “completely satisfied” with the flexibility of their hours, relationships with coworkers and their boss or immediate supervisor. But hourly workers’ satisfaction wasn’t significantly higher than that of salaried people on any of the measures captured in the survey.

“Hourly workers are significantly less satisfied with most aspects of their job, and as a result may be more difficult to manage,” the report concluded. “With the gig economy on the rise, hourly workers’ lower satisfaction with various job aspects will likely only worsen.”

Data also painted a demographic portrait of salaried vs. hourly workers: Hourly employees were more likely to be under 30, less likely to have graduated college and more likely to describe their gig as “blue collar.” They also had lower annual household incomes than salaried workers.

The research, released this week, wraps in phone interview data from 2014, 2015 and 2017 Gallup Work and Education surveys, yielding a total sample of 1,509 U.S. adults.