Employment in personal care and service occupations is anticipated to grow by 20 percent over the projection period, adding more than 1 million jobs.

As a result, service occupations are projected to have the greatest number of job openings due to replacements, about 7.6 million.

It also found, however, "rapid job growth in the lowest-paying service occupations."

The service occupations tend to have few benefits.

About 21 percent of hospital jobs are in a service occupation, such as nursing, psychiatric, and home health aides, or building cleaning workers.

Roughly 35 percent of all jobs in this segment are in service occupations, mostly dental assistants.

But a careful look at the so-called service occupations tells a different story.

It has something to do with the distinction between service industries and service occupations.

Among service occupations, there was a total increase of 25,000 jobs among the finance, insurance and real estate sectors.

Providers are often attracted to the sales and service occupations.