| 2004 | Dec | Nov | Oct | Sep | Aug | July |   | May | Apr | Mar |   | Jan |
| 2003 | Dec |   | Oct | Sep | Aug | July | June | May | Apr |   |   | Jan |
| 2002 | Dec | Nov |   | Sep | Aug | July | June | May | Apr | Mar | Feb | Jan |
| 2001 | Dec | Nov | Oct | Sep | Aug | July | June | May | Apr |   | Feb | Jan |
| 2000 | Dec | Nov | Oct | Sep | Aug | July | June | May | Apr | Mar | Feb | Jan |
| 1999 |   | Nov | Oct | Sep | Aug | July | June | May | Apr | Mar | Feb | Jan |
| 1998 |   | Nov |   | Sep | Aug |   | June |   | Apr | Mar |   |   |
| 1997 |   |   |   |   |   |   |   |   |   | Mar |   |   |
| 1996 |   |   |   |   |   |   |   |   |   |   |   |   |
| 1995 |   |   |   |   |   |   |   |   |   |   |   |   |
| 1994 |   |   |   |   |   |   |   |   |   |   |   |   |
| 1993 |   |   |   |   |   |   |   |   |   |   |   |   |
| 1992 |   |   |   |   |   |   | June |   |   |   |   |   |