Operated from 1994 onwards except 1997 & 2001, using cancellations only.
Updated 17th January 2006
Operated in 1988 only, issuing stamps.
Updated 19th July 2003
Operated from 1982 onwards, using cancellations only.
Updated 10th March 2007
Operated from 1999 using a cancellation.
Updated 22nd December 2005
Operated from ? using a cancellation.
Updated 10th March 2007
Operated from 1988 (or so) to 1991, issuing stamps.
Updated 2nd August 2008
Operated from 1982 onwards, using cancellations only.
Updated 16th January 2009
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