authors-locations        Number of unqiue authors by year and country
authors-per-paper        Authors per paper
coauthors-network        Coauthors network
coauthors-per-author     Coauthors per author
coauthors-worldmap       Coauthors network on the world map
country-contributions    Number of contributions by year and country
papers-per-author        Papers per author
regular-contributors     Regular contributors
simple-summary           Simple summary numbers by years
