Fed Rate of Interest For Summer of 1981?

 In case you are younger than 30 or don't remember the era....the Fed rate of interest for June of 1981....was 19.1-percent. 

In the summer of 1989?  It was near 9-percent.

Summer of 1995?  5.85-percent.

Fed rate in 1958?  1.57-percent.

And that summer of 1969?  8.2-percent.