HOUSTON — The number of rigs exploring for oil and natural gas in the U.S. increased by 15 this week to 939. Louisiana's count was up five to 61, an increase of 10 from a year ago.

The U.S. tally is up 280 from a year ago. It bottomed out in May 2016 at 404.

Houston oilfield services company Baker Hughes reported on Friday that 752 rigs were drilling for oil and 187 for natural gas this week.

Among oil- and gas-producing states, New Mexico gained five rigs; Oklahoma, three; Colorado, two; and Alaska and Utah, one each.

Texas lost two rigs.

Arkansas, California, North Dakota, Ohio, Pennsylvania, West Virginia and Wyoming were unchanged.