The government recently published some statistics about driving tests conducted in various places. The new 2-part test came in near the start of the 2009--2010 period (government years run from 1 April to 31 March)

Here are the number of tests added up for Wiltshire:
Period Car Motorbike
2007--2008 21305
1609
2008--2009 14186
1941
2009--2010 18585
815
 (159 old,656 new)