| 年月 | 单位：万吨 |
| 2008-12 | 41.89 |
| 2008-11 | 39.06 |
| 2008-10 | 36.43 |
| 2008-09 | 32.95 |
| 2008-08 | 30.49 |
| 2008-07 | 27.46 |
| 2008-06 | 23.98 |
| 2008-05 | 20.23 |
| 2008-04 | 16.17 |
| 2008-03 | 12.10 |
| 2008-02 | 8.01 |
| 2008-01 | 4.20 |
| 2007-12 | 43.82 |
| 2007-11 | 39.83 |
| 2007-10 | 35.69 |
| 2007-09 | 31.77 |
| 2007-08 | 27.92 |
| 2007-07 | 24.80 |
| 2007-06 | 22.01 |
| 2007-05 | 18.08 |
| 2007-04 | 14.42 |
| 2007-03 | 11.67 |
| 2007-02 | 7.74 |
| 2007-01 | 4.07 |
| 2006-12 | 45.27 |
| 2006-11 | 41.35 |
| 2006-10 | 37.66 |
| 2006-09 | 34.38 |
| 2006-08 | 28.49 |
| 2006-07 | 24.98 |
| 2006-06 | 21.15 |
| 2006-05 | 17.26 |
| 2006-04 | 13.64 |
| 2006-03 | 10.52 |
| 2006-02 | 7.22 |
| 2006-01 | 3.66 |
| 2005-12 | 39.86 |
| 2005-11 | 36.31 |
| 2005-10 | 32.37 |
| 2005-09 | 28.44 |
| 2005-08 | 24.60 |
| 2005-07 | 21.64 |
| 2005-06 | 18.47 |
| 2005-05 | 15.12 |
| 2005-04 | 11.94 |
| 2005-03 | 9.60 |
| 2005-02 | 6.49 |
| 2005-01 | 3.40 |
| 2004-12 | 39.71 |
| 2004-11 | 36.39 |
| 2004-10 | 32.79 |
| 2004-09 | 29.25 |
| 2004-08 | 26.20 |
| 2004-07 | 22.98 |
| 2004-06 | 19.54 |
| 2004-05 | 16.86 |
| 2004-04 | 13.33 |
| 2004-03 | 10.04 |
| 2004-02 | 6.99 |
| 2004-01 | 3.60 |
| 2003-12 | 39.05 |
| 2003-11 | 34.87 |
| 2003-10 | 31.08 |
| 2003-09 | 27.41 |
| 2003-08 | 23.95 |
| 2003-07 | 20.64 |
| 2003-06 | 18.29 |
| 2003-05 | 15.18 |
| 2003-04 | 11.83 |
| 2003-03 | 8.65 |
| 2003-02 | 6.06 |
| 2003-01 | 3.13 |
| 2002-12 | 34.12 |
| 2002-11 | 30.95 |
| 2002-10 | 28.03 |
| 2002-09 | 24.94 |
| 2002-08 | 21.90 |
| 2002-07 | 19.73 |
| 2002-06 | 17.02 |
| 2002-05 | 14.16 |
| 2002-04 | 11.73 |
| 2002-03 | 8.57 |
| 2002-02 | 5.28 |
| 2002-01 | 2.58 |
| 2001-12 | 33.41 |
| 2001-11 | 30.36 |
| 2001-10 | 27.31 |
| 2001-09 | 24.47 |
| 2001-08 | 23.41 |
| 2001-07 | 18.41 |
| 2001-06 | 15.51 |
| 2001-05 | 12.74 |
| 2001-04 | 10.07 |
| 2001-03 | 7.18 |
| 2001-02 | 4.24 |
| 2001-01 | 2.16 |
| 2000-12 | 29.59 |
| 2000-11 | 27.10 |
| 2000-10 | 15.36 |
| 2000-09 | 13.79 |
| 2000-08 | 12.23 |
| 2000-07 | 11.84 |
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