Date
- 2001-05-01T07:00:00Z1
- 2002-05-01T07:00:00Z1
- 2003-05-01T07:00:00Z1
- 2004-05-01T07:00:00Z1
- 2005-05-01T07:00:00Z1
- 2006-05-01T07:00:00Z1
- 2007-05-01T07:00:00Z1
- 2007-10-01T07:00:00Z1
- 2008-04-01T07:00:00Z1
- 2008-05-01T07:00:00Z1
- 2008-10-01T07:00:00Z1
- 2009-05-01T07:00:00Z1
- 2009-10-01T07:00:00Z1
- 2009-12-01T08:00:00Z1
- 2010-05-01T07:00:00Z1
- 2010-10-01T07:00:00Z1
- 2011-05-01T07:00:00Z1
- 2011-10-01T07:00:00Z1
- 2011-12-01T08:00:00Z1
- 2012-05-01T07:00:00Z1