For the ninth consecutive year, the Turner Broadcasting System once again leads all broadcast and cable networks in the Leslie Nielsen ratings, according to data released by the Leslie Nielsen Media Research organization Monday. 'With repeated broadcasts of such top Nielsen-share draws as Airplane!, The Naked Gun trilogy, and Dracula: Dead And Loving It, TBS once again maintains its forefront in bluff, hapless television,' media writer Mark Schaffer said. 'Spike TV and USA still maintain their distant second and third place.' Over 2,000 households a year are chosen to participate as Nielsen families and receive a bland-looking monitoring unit that blinks affably, falls off the top of the TV at inappropriate moments, and frequently bungles its simple data-transmission tasks. 