Mailchimp 2015 Annual ReportMailchimp
Newsletter sending heavyweights Mailchimp showcase their 2015 year in a long colorful One Pager filled with fun stats.
This website has unfortunately been redesigned or gone offline, so I have removed the direct link to it. The screenshot below hopefully preserved enough of the design but if you are really keen to inspect further, try this Archive.org link. FYI: the site was first featured on 14 December 2015.