http://www.nytimes.com/imagepages/2008/11/22/business/20081123_LAW_GRAPHIC.html
Distribution of Amercian lawyers outside of the US.
To note: this represents lawyers working internationally from the Amercian angle. It does not show the number of e.g. UK lawyers working away from their home jurisdiction.
To think: what would the statistics be in 5 years time?