Irregular shapes: from 2001 to 2005
[fino al 1975]  [dal 1976 al 2000]  [dal 2006 al 2009][dal 2010 al 2013]  [dal 2014 al 2018]  [dal 2019]
05-01-2001 - Canada  
01-02-2001 - Botswana    
08-04-2001 - Hong Kong
09-04-2001 - Canada
11-06-2001 - Pitcairn
01-08-2001 - Giappone / Japan
19-09-2001 - Tonga (self-adhesives)
01-10-2001 - Canada
12-12-2001 - Samoa
15-05-2002 - Svizzera / Switzerland  
01-06-2002 - Samoa
23-07-2002 - Canada
31-07-2002 - Vanuatu
01-10-2002 - Canada
03-01-2003 - Canada  
22-01-2003 - Samoa
25-03-2003 - Gran Bretagna / Great Britain  
17-09-2003 - Portogallo / Portugal
27-09-2003 - Francia / France  
04-11-2003 - Canada    
06-02-2004 - Giappone / Japan
26-03-2004 - Canada
28-06-2004 - Francia / France  
27-07-2004 - Tristan da Cunha
30-07-2004 - Cina / China
01-10-2004 - Canada
28-10-2004 - Brasile / Brazil
12-11-2004 - Russia
02-03-2005 - Finlandia / Finland
04-05-2005 - Nuova Zelanda / New Zealand
05-05-2005 - Corea del Nord / North Korea - Dokdo
25-07-2005 - Belgio / Belgium  
01-06-2005 - Nuova Zelanda / New Zealand
01-10-2005 - Canada    
25-10-2005 - Brasile / Brazil