The Home Depot seems determined to stay atop the Media Monitors list of radio’s leading national advertisers. This is the big-box home improvement chain’s fourth consecutive week back at number one. The Depot ran a massive 72,410 ads last week. That was enough to leave number two, State Farm with 46,352 spots, in its dust. Lowe’s came in third on the list with 38,299 spots. Completing the top five are GEICO (35,554), which took a slide from second position, and JC Penney (32,034).