We recently launched a Confluence plugin on Atlassian marketplace (Mediamark). At this point, the plugin is only compatible with some Confluence versions. In order to optimize our resources, it would be useful to know the relative level of use for the major Confluence releases. The ones that interest us are only those compatible with the marketplace license manager (3.0, 3.5, 4.0, and 4.2). Please let me know if this information is available somewhere.