The Pubmed version had broken due to a change in the Pubmed results format. It was easy to fix and now you can query for all kinds of trends in the biomedical research literature. See the previous blog post for more examples.
I also removed the “powered by Yahoo” icon because Yahoo are not serving it any more. It seems we’re using a deprecated API now, but I guess it will work for a while to come.
And while we are here, I’ll post a graph for old times’ sake: