At ISGC last month, Bob Jones, CERN's openLab director, presented a video that shows the growth in the number of grid jobs between 2004 and 2011, by each European National Grid Infrastructure.
The presentation uses the Googledoc Bubble charts. It has taken data provided by a number of EC funded projects and condensed by the eNventory project.
In 2011, the following countries were the top five users of the grid in Europe: