| 2002 | 2003 | 2004 | 2005 | 2006 |
|---|---|---|---|---|
| August | February | February | February | February |
| October | April | April | April | April |
| December | June | June | June | June |
| August | August | August | August | |
| October | October | October | October | |
| December | November | December | December | |
| December | ||||
| 2007 | 2008 | 2009 | 2010 | |
| February | February | February | February | |
| April | April | April | April | June | June | June | June | August | August | August | August | October | October | October | December | December | December |