| 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | |||||
| Jan | Jan | Jan | Jan | Jan | Jan | Jan | Jan | Jan | |||||
| Feb | Feb | Feb | Feb | Feb | Feb | Feb | Feb | Feb | |||||
| Mar | Mar | Mar | Mar | Mar | Mar | Mar | Mar | Mar |
Mar |
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| Apr | Apr | Apr | Apr | Apr | Apr | Apr | Apr | Apr |
Apr |
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| May | May | May | May | May | May | May | May | May |
May |
May |
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| Jun | Jun | Jun | Jun | Jun | Jun | Jun | Jun | Jun |
Jun |
Jun |
|||
| Jul | Jul | Jul | Jul | Jul | Jul | Jul | Jul | Jul |
Jul |
Jul(1) |
Jul |
||
| Aug | Aug | Aug | Aug | Aug | Aug | Aug | Aug | Aug |
Aug(2) |
Aug |
|||
| Sep | Sep | Sep | Sep | Sep | Sep | Sep | Sep | Sep |
Sep |
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| Oct | Oct | Oct | Oct | Oct | Oct | Oct | Oct | Oct |
Oct |
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| Nov | Nov | Nov | Nov | Nov | Nov | Nov | Nov | Nov |
Nov |
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| Dec | Dec | Dec | Dec | Dec | Dec | Dec | Dec | Dec |
Dec |
(1) - This is the end of data from Raleigh, NC (July 2009)
(2) - This is the start
of data from Greer, SC
(August 2009)