According to the February 2012 UM formerly Universal McCann report, “The Business of Social: Social Media Tracker 2012,” frequent internet users in the EU-5 have been steadily increasing their usage of microblogs, though compared to some Asian countries, like Japan, penetration remains low.Microblogs had the furthest reach in the UK in 2011, at 26.8%. Spain, despite jumping off to a strong start in 2009, was second at 24.8%. The remainder of the EU-5—Italy, Germany and France—had noticeably lower microblog user penetration.

via Microblog Penetration in France Low, but Growing as Election Nears – eMarketer.