Soon, private firms and government agencies began seeing the benefits of training people for this new job category.

But even in those four job categories, native-born workers account for more than 40 percent of the work force.

But that number begins to fall when people are asked about specific job categories.

"We needed to be able to, within a job category, acknowledge that there are different levels of performance," she said.

But the gap in some professional job categories has grown wide enough to discourage quality public service.

This is one of the largest job categories in the United States.

The Government cites the two job categories as among the fastest growing through the year 2000.

Start by looking at our map of where we work or reading about the different job categories.

The only clearly larger job categories are retail sales and food preparation.