| 1997 | 1998 | 1999 | |||||
| July | January | July | January | July | |||
| August | February | August | February | August | |||
| September | March | September | March | September | |||
| October | April | October | April | October | |||
| November | May | November | May | November | |||
| June | December | June | December | June | December | ||
| 2000 | 2001 | 2002 | |||||
| January | July | January | July | January | |||
| February* | August | February* | August | February | |||
| March | September | March | September | March | |||
| April | October | April | October | April | |||
| May | November | May | November | May | |||
| June | December | June | December | ||||
|
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