| 2008 | Winter | Spring | Summer | Fall |
| 2007 | Winter | Spring | Summer | Fall |
| 2006 | Jan06 | May06 | Aug06 | Nov06 |
| 2005 | Jan05 | May | Aug | Nov |
| 2004 | Jan | May | Aug | Nov |
| 2003 | May | June | Aug | Nov |
| 2002 | Jan02 | May | Aug | Nov |
| 2001 | Jan01 | May | Aug | Nov |
| 2000 | Jan00 | May | Aug | Nov |
| 1999 | Feb99 | May99 | Aug99 | Nov99 |
| 1998 | Jan98 | May98 | Aug98 | Nov98 |
| 1997 |
* |
* |
Aug97 | Nov97 |