It all depends on the client and the event.
Well of course it does, but you didn't answer the question asked.
Like I said, it all depends on the clients. if they want totally country, zero country. Are there certain country artists they like, or hate. Does the crowd even seem to be a country crowd?
Here's another answer to your question. I can't tell you because I don't keep track of how many songs from different generes are played.