THIS IS THE FASTEST GROWING JOB IN THE U.S.

You can probably guess what it is.

FORTUNE — As the solar industry continues to grow, so do its job opportunities.

It's no surprise then that the fastest-growing job in the U.S. between 2012 and 2016 was for a solar photovoltaic installers or someone who assembles solar panels on roofs, according to MarketWatch. The job pays about $42,500 a year.

Overall, the U.S. added 211,000 jobs in April. This is an overall increase in employment, but some industries performed better than others, especially the clean energy industry.

The second fastest-growing field was for mathematics and computer jobs, two of the fields that fall under STEM.

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