Audience numbers were just released on the Ken Burns documentary Country Music. The story says 34 million people viewed the series, for an average of 6.8 million per night:
https://www.msn.com/en-us/tv/news/k...es-345-million-viewers-pbs-reports/ar-BBWAKGV
https://www.msn.com/en-us/tv/news/k...es-345-million-viewers-pbs-reports/ar-BBWAKGV