[1rudeboy]

Take a close look at the vertical axis. It is change in percent. A fall in real wages (a negative percent change) would show the line falling below the horizontal axis.

[sarcasm]

Take a close look at the vertical axis. It is change in percent. A fall in real wages (a negative percent change) would show the line falling below the horizontal axis.

I see you still can't read a graph. Real wages climbed from 1960-1975 and are now below the peak that they reached in that year.