The number of rigs exploring for oil and natural gas in the U.S. didn't increase this week, remaining at 975 for the second week in a row. Louisiana dropped two rigs to 59, which is up from 51 a year ago.

The U.S. exceeds the 751 rigs that were active this time a year ago. The count bottomed out in May 2016 at 404.

Houston oilfield services company Baker Hughes reported Friday that 798 rigs drilled for oil this week and 177 for gas.

Among major oil- and gas-producing states, Oklahoma increased by five rigs; Alaska, four; and Pennsylvania, three.

New Mexico decreased by three rigs; Ohio and West Virginia, two; and Colorado and North Dakota, one each.

Arkansas, California, Kansas, Texas, Utah and Wyoming were unchanged.