turnovers-deaf-vs-hearing

One veteran educator of the deaf expressed alarm at the
high rate of turnovers among superintendents at schools for the
deaf. Is it any worse than turnover rate in private industry?
Don’t know, but look at the head coaching turnover rates
in big time football and basketball colleges? Look at the
turnover rates among big corporation CEO’s. Look at the
turnover rates among NFL head coaches.
Which rates are worse?