What is the average viewer age for the TV quiz show Jeopardy?

The Jeopardy show's average viewer age is 39, while the median (as many above or below) is 58.

A study done in 2013 by the New York Daily News suggested the median age was 64.5 which is grossly inaccurate. Many of the other daytime shows "researched" had incredible age data, even given that there are more senior citizens watching TV.