that would have been my next guess
and ironic that you used a dental map to compare with the US
deadhomersociety.files.wordpress.com/2010/06/thebigbookofbritishsmiles.png
( ,
Fri 21 Jan 2011, 10:20,
archived)
deadhomersociety.files.wordpress.com/2010/06/thebigbookofbritishsmiles.png