0.7 million tonnes a year spread over all of France, Germany, BeNeLux, Italy, Japan, the Pacific, Indonesia, Malaysia, Indochina and China. 0.4 million tonnes a year over just the Eastern half of Indochina is a huge escalation in bombings.
Again, link is nice. And when America was going full out, I don't doubt you, but the world population in 1941 was 2.5 thousand million, by 1975, it was 4 thousand million, you have to account for that, too.