I think the data, while true, doesn’t do a great job of illustrating culture, tradition, education policy, and industrial policy.
That’s just my interpretation though. Like I said, knowing what I know about India and China in conjunction with their large populations, and their potential for increased growth and resource development, I don’t feel like it’s anything you should be spilling tea over. I would be more concerned if the US had a drop in total yearly publications rather than being overtaken.