| 年月 | 单位：% |
| 2007-12 | -17.90 |
| 2007-11 | -12.90 |
| 2007-10 | -12.60 |
| 2007-09 | -13.40 |
| 2007-08 | -16.40 |
| 2007-07 | -19.40 |
| 2007-06 | -18.80 |
| 2007-05 | -25.50 |
| 2007-04 | -32.10 |
| 2007-03 | -30.60 |
| 2007-02 | 2.90 |
| 2007-01 | -1.30 |
| 2006-12 | 18.90 |
| 2006-11 | 14.60 |
| 2006-10 | 17.50 |
| 2006-09 | 19.90 |
| 2006-08 | 29.50 |
| 2006-07 | 30.20 |
| 2006-06 | 29.00 |
| 2006-05 | 31.90 |
| 2006-04 | 28.30 |
| 2006-03 | 45.60 |
| 2006-02 | 12.50 |
| 2006-01 | 11.00 |
| 2005-12 | -15.40 |
| 2005-11 | -10.90 |
| 2005-10 | -4.00 |
| 2005-09 | -1.80 |
| 2005-08 | -2.00 |
| 2005-07 | -0.80 |
| 2005-06 | 5.60 |
| 2005-05 | 14.70 |
| 2005-04 | 34.10 |
| 2005-03 | 36.10 |
| 2005-02 | 88.60 |
| 2005-01 | 97.80 |
| 2004-12 | 52.90 |
| 2004-11 | 55.20 |
| 2004-10 | 47.40 |
| 2004-09 | 50.50 |
| 2004-08 | 44.60 |
| 2004-07 | 41.90 |
| 2004-06 | 42.40 |
| 2004-05 | 42.00 |
| 2004-04 | 32.20 |
| 2004-03 | 22.30 |
| 2004-02 | -21.80 |
| 2004-01 | -47.80 |
| 2003-12 | -38.60 |
| 2003-11 | -40.00 |
| 2003-10 | -39.80 |
| 2003-09 | -42.30 |
| 2003-08 | -41.50 |
| 2003-07 | -41.50 |
| 2003-06 | -43.80 |
| 2003-05 | -46.30 |
| 2003-04 | -48.70 |
| 2003-03 | -53.30 |
| 2003-02 | -43.70 |
| 2003-01 | -39.80 |
| 2002-12 | -0.70 |
| 2002-11 | -5.50 |
| 2002-10 | -11.30 |
| 2002-09 | -13.20 |
| 2002-08 | -15.50 |
| 2002-07 | -19.10 |
| 2002-06 | -20.70 |
| 2002-05 | -19.10 |
| 2002-04 | -19.00 |
| 2002-03 | -21.70 |
| 2002-02 | -8.30 |
| 2002-01 | 0.00 |
| 2001-12 | -23.80 |
| 2001-11 | -23.80 |
| 2001-10 | -23.80 |
| 2001-09 | -24.70 |
| 2001-08 | -25.40 |
| 2001-07 | -20.40 |
| 2001-06 | -13.00 |
| 2001-05 | -13.10 |
| 2001-04 | -6.70 |
| 2001-03 | 3.40 |
| 2001-02 | 13.20 |
| 2001-01 | 25.30 |
| 2000-12 | 12.50 |
| 2000-11 | 12.70 |
| 2000-10 | 16.60 |
| 2000-09 | 31.00 |
| 2000-08 | 55.30 |
| 2000-07 | 63.70 |
| 2000-06 | 70.40 |
| 2000-05 | 75.00 |
| 2000-04 | 74.10 |
| 2000-03 | 52.60 |
| 2000-02 | 4.00 |
| 2000-01 | 9.20 |
| 1999-12 | 35.70 |
| 1999-11 | 39.80 |
| 1999-10 | 35.00 |
| 1999-09 | 18.50 |
| 1999-08 | 2.40 |
| 1999-07 | -3.80 |
| 1999-06 | -13.50 |
| 1999-05 | -20.40 |
| 1999-04 | -27.30 |
| 1999-03 | -26.60 |
| 1999-02 | -6.50 |
| 1999-01 | -18.50 |
| 1998-12 | -50.30 |
| 1998-11 | -49.20 |
| 1998-10 | -48.60 |
| 1998-09 | -46.40 |
| 1998-08 | -46.70 |
| 1998-07 | -42.50 |
| 1998-06 | -38.50 |
| 1998-05 | -34.70 |
| 1998-04 | -31.60 |
| 1998-03 | -17.80 |
| 1998-02 | -26.60 |
| 1998-01 | -10.30 |
前瞻产业研究院 咨询·服务