How many men did Lucas McCain kill during the Rifleman series?

Personal Quote from Chuck Connors on his Lucas McCain character:

"We once figured out that I killed on the average of two and a half people per show. "

Source - http://en.wikipedia.org/wiki/Chuck_Connors

Also from Wikipedia: "....he killed four the day he first showed up in town."

Source - http://en.wikipedia.org/wiki/The_Rifleman