1.0 15 Jan 2001
2.0 15 Mar 2001
3.0 15 Sep 2001
4.0 16 Jun 2002
4.5 16 Oct 2004
4.6 16 Apr 2005
4.7 16 May 2006
5.0 15 Jan 2007
6.0 13 Feb 2008
7.0 5 Jan 2011
7.26 15 Jan 2014