It looks like the folks at State Farm are sold on radio, as the insurance and financial services company was the leading national advertiser for the medium for the third week in a row, according to Media Monitors. Moreover, State Farm ran a massive 74,215 ads last week. GEICO clung to second position with 59,089 spots, just ahead of American Express, which ran 57,081. Vicks (48,495) moved up a place to fourth, while the National Highway Traffic Safety Administration (37,413) claimed fifth position. Perennial powerhouse advertiser The Home Depot was missing in action for the second week running.