Mapping NCBI/PUBMED

In my previous post I showed how I used the tag <Affiliation> from the XML/pubmed records to extract the mails and the names from the authors of a paper. I've slightly changed the source code of this program to find the country of origin of each paper. To retrieve the country I used:
1) the suffix of the mail (if any)
2) the name of the country (if any)
3) the name of the city (a few famous one such as Standord, for the US or UK)

My program takes as input a pubmed query and the ouput is the number of papers per year and per country. I put a few results on ManyEyes. As an example with the query "Rotavirus" with 1000 records, I was able to retrieve 887 countries.

Publications in "Bioinformatics", "BMC Bioinformatics", "Plos Comp. Biol."

Publications about "Rotavirus"

publications about malaria, anopheles, plasmodium etc...