| Period | Index | Previous Year | Previous Month |
|---|---|---|---|
| August, 2008 | 87.4 | 3.1% | -0.3% |
| July, 2008 | 87.7 | 3.3% | 0.6% |
| June, 2008 | 87.2 | 3.2% | 0.3% |
| May, 2008 | 86.9 | 3.0% | 0.6% |
| April, 2008 | 86.4 | 2.4% | -0.2% |
| March, 2008 | 86.6 | 3.1% | 0.5% |
| February, 2008 | 86.2 | 2.9% | 0.5% |
| January, 2008 | 85.8 | 2.8% | -0.3% |
| December, 2007 | 86.1 | 3.1% | 0.6% |
| November, 2007 | 85.6 | 3.4% | 0.6% |