On https://analytics.wikimedia.org/dashboards/browsers/#all-sites-by-os-and-browser the share of IE7
- is increasing regularly which is surprising,
- includes a majority on OS Windows 7 and Windows 8, both OS incompatible with IE7.
These user agents should be either considered as other or invalid.
By the way is it a percentage of page views, daily unique devices, monthly unique devices, http request... ?