As gasoline prices flirt with all-time highs, an index released this week, Oil Price Information Service, broke down who’s paying the most taking into account local gasoline prices and local monthly income. The biggest losers are drivers living in Clay County, Ky., who shell out 14.78percent of their monthly income to buy gasoline costing $3.156 a gallon. While the price there is far lower than the retail average in San Juan County, Wash., which is the highest in the country at $3.926 a gallon, Clay County’s average monthly income of $1,423.67 is the lowest nationwide, making any increase in gasoline prices much more painful. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!