Can you show data that shows how much productivity has fallen? Also, how productivity and wages change in last 30-40 years. From what I know, although wages in

Can you show data that shows how much productivity has fallen? Also, how productivity and wages change in last 30-40 years. From what I know, although wages in low and middle jobs stagnate, the productivity now is extremly high. Also, in which countries it's objectively and subjectively true?