9 jobs with the oldest American workers

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    America is showing its age.

    The country is increasingly getting older, and population growth is expected to slow and tilt toward the oldest age groups by 2050. The demographic shift will affect everything from demand for health care services to the shape of the workforce, which already is getting grayer as many baby boomers put off retirement because they enjoy their careers or need to sock away more money for retirement.

    This workforce shift is happening in a number of professions. In some cases, workers have aged in place as younger workers lost interest in pursuing those careers. Social changes and expectations that other industries -- such as health care and education -- will provide better career opportunities have prompted many younger people to pursue training in those fields.

    Even so, some of America's oldest professions are eager to recruit younger workers.

    About 34.4 million people over the age of 55 were in the workforce last year, including almost 9 million Americans older than 65 years, according to the Bureau of Labor Statistics (BLS). By comparison, about 31.5 million millennials, those between the ages of 25 to 34, participated in the workforce in 2016.

    Across all occupations, about 23 percent of the American workforce is now 55 years or older. Read on to learn about which jobs in America have the highest share of older workers.