I am looking for historical data from the U.S. Census of Manufacturers for the period from 1945 to today, and ideally even for the period before 1945. On this website, I found out that such data does exist - at least from 1947 onwards. However, because the original reports were published as books (see this one, for example) I am not sure whether the historical data was digitized at some point and if it is available.
Can I download the data somewhere? (If so, where?) Or will I need to go to a library and digitize everything myself?