(CareerBuilder.com) -- Although the job market today is improving, there are still 15 million unemployed people in the United States, according to the Bureau of Labor Statistics.

That's 15 million people looking for something -- anything -- to earn a few extra bucks.

In March 2010, the number of people working part time for economic reasons (also referred to as involuntary part-time workers) increased to 9.1 million. According to the BLS, these people were working part time because their hours were cut back or because they were unable to find a full-time job.

If you're looking for a way to boost your income, if you're either unemployed or looking to pad your full-time salary, here are 10 part-time jobs experiencing job growth in the next 10 years:

1. Animal caretaker

Job growth: 21 percent

Number available jobs: 45,500

Annual salary: $19,360

2. Bartender

Job growth: 8 percent

Number available jobs: 40,800

Annual salary: $20,970

3. Customer Service Representatives

Job growth: 18 percent*

Number available jobs: 399,500

Annual salary: $29,860**

4. Dental assistant

Job growth: 36 percent

Number available jobs: 105,600

Annual salary: $32,380

5. Hotel, motel, and resort desk clerks

Job growth: 14 percent

Number available jobs: 31,500

Annual salary: $19,480

6. Library assistant

Job growth: 11 percent

Number available jobs: 13,500

Annual salary: $24,790

7. Museum technicians and conservators

Job growth: 26 percent

Number available jobs: 2,800

Annual salary: $36,660

8. Pharmacy technicians and aides

Job growth: 25 percent

Number available jobs: 96,300

Annual salary: $27,710 and $20,100

9. Recreation workers

Job growth: 15 percent

Number available jobs: 48,200

Annual salary: $21,960

10. Security guards

Job growth: 14 percent

Number available jobs: 152,500

Annual salary: $23,460

* Number of available jobs from 2008 to 2018

** Median annual wages from May 2008

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