The number of rigs exploring for oil and natural gas in the U.S. declined by 11 this week to 898. Louisiana shed four rigs to 58, which is 10 higher than a year ago. 

The U.S. tally is up from 569 rigs that were active a year ago. The count bottomed out in May 2016 at 404.

Houston oilfield services company Baker Hughes said Friday that 729 rigs sought oil and 169 explored for natural gas this week.

Among major oil- and gas-producing states, Colorado added four rigs; Texas, three; and Alaska,  two.

Oklahoma lost eight rigs; New Mexico and North Dakota, two each; and Utah, one.

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