$260 million Gene Perry // June 13, 2019 // Updated: June 13, 2019 Number of the Day How much additional revenue was brought in last September through April due to Oklahoma’s gross production tax increase on oil and gas drilling. [Source: Oklahoma Policy Institute] Share This:FacebookTwitterLinkedInTumblrRedditPocketEmailPrint ABOUT THE AUTHOR Gene Perry // firstname.lastname@example.org Gene Perry worked for OK Policy from 2011 to 2019. He is a native Oklahoman and a citizen of the Cherokee Nation. He graduated from the University of Oklahoma with a B.A. in history and an M.A. in journalism.