I would to count the number of unique authors in publications referenced by PubMed in the last 10 years. Any ideas how to do this?
I tried downloading tarballs of abstracts here: http://www.ncbi.nlm.nih.gov/pmc/tools/ftp/
But these don't really contain author names, just their acronyms (at least the file I looked at did).
If an accurate number would be too difficult or impossible to get, I am looking for other ways to estimate the number of life science researchers who have published something in the last 10 years.