Is this 70% all time ? well , if thats the case , ALL TIME championships by county :
1. Williamson ( brentwod Academy , Brentwood .etc. )
2. Rutherford ( murfreesboro central in the 50s,60s, rivedale, oakland)
3. Davidson ( private schools rule plus pearl cohn , hilsboro , etc )
4. Shelby ( memphis schools )
5. Bradley ( clevelands run , bradley high in the 60s and 70s )
6. Oak Ridge ( dont know the county , is it anderson )
*** any other thoughts ***