Notice it grew slightly during the depression in the twenties and had a WW2 bump - but by the chart, not much. Manufacturing even grew during the Carter administration.... Wow! And, what about all the factories closing and our trade deficit?
If you want a true picture, overlay charts of our trade deficit and population growth - then list everything they consider industrial production. Answer? It's all about population baby! Millions up millions of new people will move the chart even as our manufacturing jobs are shredded and moved overseas or to Mexico.
For some apparently. Not me. I like up-trends better than down-trends.
I'm voting for Trump. I am for Trump Big Time. But he not going to rebuild the manufacturing sector of the 70's or 80's not matter what he tells us.
We build stuff overseas because they can do it cheaper. That means some Americans lose their jobs. It also means you and me get more stuff. If you want to get those jobs back just add a tax (tariff) on imported goods and it will happen. The jobs will return and you and I will pay for it with a lower standard of living.
You need to read a little more Milton Friedman and a little less Trump to understand this argument.