As a kid I used to go through my dad's church's old file bins and find old, I mean really old, church bulletins. It was a nerdy kind of neat to see if I could find old fliers that hadn't been handed out since 1963 and what kind of art/style was on the brochure. And so I found a couple of these charts which are kind of neat in that same nostalgic sense, economic charts from the 1970's.
No aid of computers or Excel, it seemed this stuff was done by hand maybe? I can't tell, but it was no less advanced. I could only imagine how long it would have taken to craft a chart like this.