The US economy is expected to add more than 7.2 million jobs over the next five years; the gains will occur disproportionately in high-wage and low-wage occupations, according to new research released by CareerBuilder.

Both high-wage and low-wage occupations are projected to grow 5%, but middle-wage jobs are projected to grow only 3%.

The research also found 61% of the 173 occupations expected to lose jobs in the next five years are in the middle-wage category.

CareerBuilder defined middle-wage jobs as those that earn between $13.84 to $21.13 per hour.

“The US is facing a sustained trend of declining middle-wage employment that has serious implications not only for workers, but for the economy overall,” CareerBuilder CEO Matt Ferguson said. “If we can’t find a way to re-skill and up-skill workers at scale, middle-wage workers will become increasingly susceptible to unemployment or will have to move into lower-paying roles that may not support them and their families. This can have a negative ripple effect on consumer spend, housing, investing and other key financial indicators.”

High-wage jobs expected to grow the most over the next five years include:

• Software developers, applications, to rise 12%
• Computer systems analysts, to rise 12%
• Market research analysts and marketing specialists, to rise 11%
• Management analysts, to rise 9%
• Registered nurses, to rise 9%

High-wage jobs expected to decline the most over the next five years include:

• Postal service mail carriers, to fall 8%
• Reporters and correspondents, to fall 7%
• Construction managers, to fall 5%
• Real estate sales agents, to fall 4%
• First-line supervisors of production and operating workers, to fall 1%

Middle-wage jobs expected to grow the most over the next five years include:

• Medical assistants, to rise 11%
• Customer service representatives, to rise 6%
• Maintenance and repair workers, to rise 5%
• Heavy and tractor-trailer truck drivers, to rise 4%
• Office clerks, to rise 4%

Middle-wage jobs expected to decline the most over the next five years include:

• Printing press operators, to fall 9%
• Farmers, ranchers and other agricultural managers, to fall 7%
• Travel agents, to fall 6%
• Carpenters, to fall 2%
• Bookkeeping, accounting and auditing clerks, to fall 2%

Low-wage jobs expected to grow the most over the next five years include:

• Home health aides, to rise 19%
• Cooks, restaurant, to rise 9%
• Nursing assistants, to rise 9%
• Security guards, to rise 6%
• Janitors and cleaners, to rise 6%

Low-wage jobs expected to decline the most over the next five years include:

• Door-to-door sales workers, news and street vendors, to fall 18%
• Sewing machine operators, to fall 14%
• Floral designers, to fall 10%
• Cooks, fast food, to fall 3%
• Tellers, to fall 2%