(CNN Money) — The number of registered nurses is expected to swell to 3.2 million by 2018, accounting for approximately 581,500 new jobs, according to the Bureau of Labor Statistics. That’s up from 2.6 million today, and it represents the largest overall growth projection out of all occupations in the U.S. economy, for good reason. Americans aged 65 and older will make up 19% of the population in 2030, up from 12.4% in 2000. As the population ages and the growth of the working-age population slows down, there will be an increased demand for health care services in general, and home health care services in particular. In the past year, the home health care services industry has experienced sales growth of 11.2%, making it the fastest growing industry in the U.S., according to Sageworks, a financial analysis company.