Unicode Popularity: How Popular is UTF-8?

By Xah Lee. Date: 2010-01-29. Last updated: 2016-06-30.

Utf-8 Usage on the Web
2010	2011	2012	2013	2014	2015	2016
50.6%	59.8%	68.0%	74.7%	78.7%	82%	87.2%

Source: http://w3techs.com/technologies/history_overview/character_encoding/ms/y

The following is 2001 to 2010.

unicode on web — Unicode use on the web. 〔Unicode nearing 50% of the web 2010-01-28. By Mark Davis, Senior International Software Architect at Google. @ http://googleblog.blogspot.com/2010/01/unicode-nearing-50-of-web.html〕

See also: Unicode Basics: What's Character Set, Character Encoding, UTF-8?