How much of production was devoted to tanks, planes, ships, ammunition etc.? Links to published papers are very welcome, as well as sources for the other powers in the war. I'm not interested in production numbers of individual weapons on their own but rather how much of production or spending was devoted to each category. Employment numbers might be a useful proxy. This is a paper which gives some numbers about Germany, but I couldn't find anything for the US (DOI: 10.5787/44-2-1178). I checked the wikipedia article on military production https://en.wikipedia.org/wiki/Military_production_during_World_War_II but it only provides either total defense spendings as a percentage of gdp or the number of weapons in each category. I didn't find any sources of anyone having estimated the share of production devoted to each category of weapons for the us. As comparable calculations have been made for Germany in the linked source, the idea of production being fungible is not unrealistic.