This is only a measure of "social media popularity of national offices of either head of state, head of government, or government as a whole" (with respect to national education levels) according to the original report. [1] The report also classifies the social media strategies of various OECD countries, but does not list Germany's. [2, right side] Perhaps the Chancellor's office has other priorities.

[1] http://www.keepeek.com/Digital-Asset-Management/oecd/governa...

[2] http://www.keepeek.com/Digital-Asset-Management/oecd/governa...