I'm having trouble with oil revenue currently supporting 2/3 of the budget.  "days of low oil prices and low production rates, oil provides 67 percent of the state's unrestricted revenues and supports one-third of our economy".  This conflicts with the statement further in the opinion piece: "You can't take in revenues of about $1.5 billion, spend approximately $4.5 billion per year".  In fact, I believe the budget is greater than $4.5 billion, but 2/3 of $4.5 billion is $3 billion.  I don't see oil supporting $3 billion of state government costs, but maybe I don't understand the qualifier "unrestricted" revenue.  Please help me with this math!