Date
- 1980-01-01T08:00:00Z1
- 1981-01-01T08:00:00Z1
- 1982-01-01T08:00:00Z1
- 1984-01-01T08:00:00Z1
- 1985-01-01T08:00:00Z1
- 1986-01-01T08:00:00Z1
- 1989-03-01T08:00:00Z1
- 1995-01-01T08:00:00Z1
- 1996-01-01T08:00:00Z1
- 1996-06-01T07:00:00Z1
- 1997-01-01T08:00:00Z1
- 1997-06-01T07:00:00Z1
- 1998-01-01T08:00:00Z1
- 2000-06-01T07:00:00Z1
- 2001-01-01T08:00:00Z1
- 2001-06-01T07:00:00Z1
- 2003-06-01T07:00:00Z1
- 2004-06-01T07:00:00Z1
- 2005-06-01T07:00:00Z1
- 2006-01-01T08:00:00Z1