A federal labor report released this week says Marcellus Shale gas drilling has added about 15,000 direct jobs in the oil and natural gas industry in Pennsylvania in recent years.
While the industry has not created hundreds of thousands of new jobs, the employment gains were "substantial," said the U.S. Bureau of Labor Statistics, which tracks employment and wages.
In 2007, the federal government said 5,829 people worked in Pennsylvania's oil and natural gas industry. By 2012, that number was 20,943 - an increase of 15,114.
"Despite recent declines in Pennsylvania's overall economy, the state's oil and natural gas industry has seen substantial growth in terms of both employment and wages," the federal study said. Gross withdrawals from shale gas wells amounted to two trillion cubic feet between 2008 to 2012, trailing only Louisiana, the government said.