| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year | | 2004 | 4.9 | 4.9 | 4.8 | 4.8 | 4.7 | 4.7 | 4.9 | 4.8 | 4.6 | 4.6 | 4.5 | 4.5 | 4.7 | | 2005 | 4.5 | 4.6 | 4.5 | 4.5 | 4.5 | 4.3 | 4.4 | 4.3 | 4.2 | 4.4 | 4.5 | 4.4 | 4.4 | | 2006 | 4.4 | 4.1 | 4.1 | 4.1 | 4.1 | 4.3 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 | 4.1 | | 2007 | 4.0 | 4.0 | 4.0 | 3.9 | 3.8 | 3.7 | 3.6 | 3.8 | 4.0 | 3.9 | 3.8 | 3.8 | 3.9 | | 2008 | 3.8 | 3.9 | 3.8 | | | | | | | | | | |
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PAGETOP