The requested information is not available broken down by the individual grades within the leadership group.
The following table provides the number of leadership teachers who retired from publicly-funded schools in England by the end of March in the financial years 2009-10, 2010-11, 2011-12 and 2012-13. Information for 2013-14 is not yet available.
Source: Database of Teacher Records and Pensioner Statistical System (PENSTATS).
Figures are rounded to the nearest 10 teachers.
 Includes retirements such as Premature, Actuarially Reduced Benefits, Age, and Ill Health of head teachers, deputy heads and assistant heads.
 Local authority maintained schools.
 Provisional estimates.