Even if you have a source for this data, how many of these jobs are going to be lost to automation and process improvements in the next 5-10 years? My father recently retired form a steel mill. He wasn't replaced. My city's entire economy used to be based around steel manufacturing. There's still plants here, but the number of people who work in the steel industry has steadily declined. Here is a cited source to say it's down 42% since 1990 [0]. In addition to the steel industry, I work in the financial sector. It used to take a room full of accountants to file with the SEC. Now it takes one or two to input the data and check for errors in the software. Process enhancements and technology are going to eat people's lunch and manufacturing is one of the easiest areas to automate and streamline.

[0]: https://www.politifact.com/punditfact/statements/2018/mar/08...