What percentage of the United States' gross national product is related to the welding industry?

A recent study found that 50% of the United States' gross national product is related to welding in some way, shape or form. Just think about the number of items used in construction, transportation, etc. There are so many elements in each of these that contains some type of weld.

Asked by Jennifer Sinclair · Last updated 5 years ago · 4K views · SOURCE