  I'm revisiting my MP3 copy of the interview, I remember that the song was a smash hit when the movie came out in December 1969. The song (on B.J.s album) sold 2 million by press-time March 14, 1970. I don't know if that includes soundtracks and singles.  and is one of Thomas' biggest sellers (out of more than 70 million in sales) according to Amazon.