| Period | Index | Previous Year | Previous Month |
|---|---|---|---|
| April, 2005 | 81.0 | 1.1% | -0.4% |
| March, 2005 | 81.3 | 1.8% | 0.5% |
| February, 2005 | 80.9 | 1.6% | 0.4% |
| January, 2005 | 80.6 | 1.5% | -0.7% |
| December, 2004 | 81.2 | 2.3% | 1.1% |
| November, 2004 | 80.3 | 1.9% | -0.1% |
| October, 2004 | 80.4 | 1.8% | 0.1% |
| September, 2004 | 80.3 | 1.6% | -0.2% |
| August, 2004 | 80.5 | 1.9% | 0.1% |
| July, 2004 | 80.4 | 1.8% | 0.1% |