| 2007 | 2008 |
| January | January |
| February | February |
| March | March 1 2 |
| April | April |
| May | May |
| June | July |
| July | July |
| August | August |
| September | September |
| October | October |
| November | November |
| December | December |
| 2009 | 2010 |
| January | January |
| February | February |
| March | March |
| April | April |
| May | May |
| June | June 1 2 |
| July | July |
| August | August |
| September | September |
| October | October |
| November | November |
| December | December |