The lure of remote work is obvious. You can save on the costs of a formal work wardrobe, lunches out and commuting.

Until now, you might have been limited in your choice of jobs. That's changing. Some fields had an increase of more than 50% in remote jobs in the past year, according to FlexJobs.

More than 4 million employees — slightly more than 3% of the U.S. workforce — work from home at least half the time, according to Global Workplace Analytics, a telecommuting research site.

Certain careers offer more remote jobs than others. FlexJobs found that seven fields had high rates — more than 50% — of remote career opportunities over the last year.

Some of these are somewhat surprising, since they aren't typically associated with remote work.

A "remote job" is defined as professional-level employment that allows the worker to do the job from home either entirely or part of the time. These types of gigs include telecommuting jobs, virtual jobs, at-home jobs and other similar names.

Here are some categories that have seen high remote-job growth in 2018: