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If you're likely to be in the job market at some point over the next decade, then I have some good news and some bad news.

The good news is that a number of occupations are projected to grow considerably over that time period. According to a recently released study by the U.S. Department of Labor, the average increase in new jobs among the 10 vocations with the highest forecasted numeric change in employment between 2012 and 2022 is 385,000.

By itself that may not seem like a lot, but that adds up to a total of nearly 4 million new jobs in these 10 professions alone. And if you include the next 10, the total figure shoots up to nearly 6 million new positions.

Occupation

Number of Projected New Jobs Over the Next Decade

2012 Median Pay

Personal-care aides

580,800

$19,910

Registered nurses

526,800

$65,470

Retail salespersons

434,700

$21,110

Home health aides

424,200

$20,820

Food-service workers

421,900

$18,260

Nursing assistants

312,200

$24,420

Administrative assistants

307,800

$32,410

Customer-service representatives

298,700

$30,580

Janitors and cleaners

280,000

$22,320

Construction laborers

259,800

$29,990

Source: U.S. Department of Labor

The demand for personal-care aides is expected to generate the largest single increase, with an estimated need for more than 580,000 new workers. Registered nurses come in second at 526,800, followed by retail salespersons, food-service workers, nursing assistants, and administrative assistants.

It's worth noting that four of the top six are in the health-care sector, likely a reflection of the aging baby boomer population.

So what's the bad news? The bad news is that many of these jobs pay meager salaries. Take the top profession on the list. The median pay for personal-care aides in 2012 came in just below $20,000. Retail salespersons earned slightly more at $21,110, and home health aides clocked in at a median pay of $20,820.

Meanwhile, the highest-paying position on the list, registered nurses, earned an increasingly respectable median income of $65,470 in 2012, while the lowest-paying positions, those in food service, earned a median income of only $18,260 over the same time period.

For investors in the stock market, if not prospective job applicants, it's hard to deny that the creation of new positions is good news. In an economy that's powered predominantly by consumer spending, any increase in employment is a positive sign, and one that's bound to buttress the S&P 500 (SNPINDEX:^GSPC), as well as other indexes.

The only question is whether the meager salaries will potentially counteract the numeric growth in positions. The answer to that question remains to be seen.

John Maxfield and The Motley Fool have no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.