In inflation-adjusted dollars, how have average wages in the United States changed in the last 20 years?

Question

1 Wages have gone up.
2 Wages have gone down.
3 Wages have varied every few years.
4 Wages have stayed the same.

Answer 1

4. It seem unbelievable that with an increase in GDP per person up more than 50%, average wages for non management workers have not increased, but it is true,

Answer 2

Wages have gone down.