Texas oil and natural gas companies added 4,800 upstream jobs in June, marking the 19th consecutive month of job growth, according to data from the Texas Workforce Commission (TWC).

The state has recovered 42% of jobs lost between the high point in employment in December 2014 and the low point in September 2016, data indicated.

“Oil and natural gas upstream jobs are growing alongside massive industry investment and unprecedented production in Texas,” said Texas Oil & Gas Association President Todd Staples. “This increased job growth and investment benefits all Texans by helping to fuel our state’s economy and contribute to our nation’s energy security.”

Schlumberger Ltd. on Friday said it was paying particular attention to projected oil and gas takeaway constraints in the Permian Basin. “The rate of permitting and the overall activity levels remain high,” said CEO Paal Kibsgaard, even though oil and gas pipeline constraints “could hamper the activity growth over the coming quarters, which is something we will monitor closely going forward.”

Since its low point in late 2014, employment in the Texas upstream sector has grown by 48,400 jobs, the TWC said.

For the first half of this year, monthly job gains have averaged 3,800, compared with the first half of 2017, when job gains averaged 2,700 jobs per month.