A friend in New York State just emailed me a series of Jukebox website links playing 20 songs from each year between the 1950s and 1979. Gordon Lightfoot's "Sundown" is included in the 1974 link.
http://upchucky.com:80/music-jukes/1974/player.html
by the way, Melbourne's Age newspaper today included the following letter to the editor from a Mr Guy Freeman in the suburb of Newport:
"Between 1871 and 1875, the Canadian Pacific Railway was constructed over rivers, over and through the Rockies in the most extreme conditions. A distance of 4700Km (2900 miles) in four years. This government is going to take four years to build a railway of 55Km (from Melbourne's Southern Cross Station to the West Werribee district). That's progress."