Louisiana’s total nonfarm employment declined by 15,400 jobs in January from a year earlier, the sixth consecutive month with a loss from the previous year, the Louisiana Workforce Commission reported Monday.

Statewide, private-sector employers lost 13,200 jobs from January 2015, for a total of 1,656,800 jobs. The mining and logging sector, which primarily includes the struggling oil and gas industry, was responsible for most of the losses, showing 12,100 fewer jobs than in January 2015, figures adjusted for seasonal factors show.

“The benchmarked data show that the decline in oil prices has had tremendous effects on the employment situation in our state,” said Ava Dejoie, executive director of the Louisiana Workforce Commission. “Job losses in oil-dependent MSAs and in secondary job sectors are a concern.”

Meanwhile, revised seasonally-adjusted figures for 2015 show Louisiana lost more jobs than earlier estimated, weighed down by the impact of low oil prices. The state lost 18,200 jobs from January 2015 through December 2015, which is 8,200 more than previously reported. However, the average total of jobs for the year was 1,989,600, which is 2,900 more jobs than earlier estimates.