There used to be a theory that CHR boomed when the economy was good and did poorly when the economy was in recession. This held true through the 1980s and 1990s.
Considering that Detroit has the worst economy in the U.S, either the CHR/economic correlation no longer holds true or WKQI is such a good station they were able to overcome it. No matter what, congratulations for being #1. Few markets have a CHR that is #1 12+.