| 季度 | 单位：% |
| 2008-12 | 99.50 |
| 2008-09 | 100.50 |
| 2008-06 | 100.10 |
| 2008-03 | 83.80 |
| 2007-12 | 99.60 |
| 2007-09 | 98.60 |
| 2007-06 | 99.00 |
| 2007-03 | 90.20 |
| 2006-12 | 98.70 |
| 2006-09 | 101.00 |
| 2006-06 | 100.40 |
| 2006-03 | 95.70 |
| 2005-12 | 97.40 |
| 2005-09 | 100.10 |
| 2005-06 | 96.40 |
| 2005-03 | 93.70 |
| 2004-12 | 97.50 |
| 2004-09 | 115.50 |
| 2004-06 | 100.40 |
| 2004-03 | 85.90 |
| 2003-12 | 100.70 |
| 2003-09 | 98.90 |
| 2003-06 | 98.20 |
| 2003-03 | 101.20 |
| 2002-12 | 98.00 |
| 2002-09 | 99.80 |
| 2002-06 | 93.20 |
| 2002-03 | 81.00 |
| 2001-12 | 100.70 |
| 2001-09 | 101.90 |
| 2001-06 | 99.40 |
| 2001-03 | 87.00 |
| 2000-09 | 95.10 |
| 1999-12 | 100.20 |
| 1999-09 | 97.80 |
| 1999-06 | 97.20 |
| 1999-03 | 95.40 |
| 1998-09 | 96.70 |
| 1998-06 | 96.20 |
| 1998-03 | 94.10 |
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