| 年月 | 单位：万吨 |
| 2010-12 | 46.30 |
| 2010-11 | 43.40 |
| 2010-10 | 40.47 |
| 2010-09 | 39.60 |
| 2010-08 | 40.00 |
| 2010-07 | 42.40 |
| 2010-06 | 41.70 |
| 2010-05 | 45.97 |
| 2010-04 | 42.00 |
| 2010-03 | 37.40 |
| 2010-02 | 26.68 |
| 2010-01 | 34.50 |
| 2009-12 | 36.26 |
| 2009-11 | 34.90 |
| 2009-10 | 32.07 |
| 2009-09 | 29.09 |
| 2009-08 | 31.64 |
| 2009-07 | 29.56 |
| 2009-06 | 28.26 |
| 2009-05 | 24.60 |
| 2009-04 | 23.77 |
| 2009-03 | 24.83 |
| 2009-02 | 21.01 |
| 2009-01 | 20.88 |
| 2008-12 | 28.00 |
| 2008-11 | 25.20 |
| 2008-10 | 23.75 |
| 2008-09 | 22.81 |
| 2008-08 | 21.85 |
| 2008-07 | 23.13 |
| 2008-06 | 22.49 |
| 2008-05 | 20.08 |
| 2008-04 | 19.12 |
| 2008-03 | 21.68 |
| 2008-02 | 22.01 |
| 2008-01 | 29.59 |
| 2007-12 | 28.59 |
| 2007-11 | 24.94 |
| 2007-10 | 21.02 |
| 2007-09 | 20.58 |
| 2007-08 | 17.60 |
| 2007-07 | 17.19 |
| 2007-06 | 17.34 |
| 2007-05 | 16.19 |
| 2007-04 | 15.22 |
| 2007-03 | 14.21 |
| 2007-02 | 11.78 |
| 2007-01 | 15.37 |
| 2006-12 | 21.28 |
| 2006-11 | 17.53 |
| 2006-10 | 16.13 |
| 2006-09 | 15.85 |
| 2006-08 | 14.87 |
| 2006-07 | 13.90 |
| 2006-06 | 13.79 |
| 2006-05 | 12.76 |
| 2006-04 | 12.71 |
| 2006-03 | 12.79 |
| 2006-02 | 10.84 |
| 2006-01 | 13.47 |
| 2005-12 | 16.78 |
| 2005-11 | 13.74 |
| 2005-10 | 12.43 |
| 2005-09 | 12.20 |
| 2005-08 | 10.62 |
| 2005-07 | 10.04 |
| 2005-06 | 10.85 |
| 2005-05 | 9.82 |
| 2005-04 | 9.53 |
| 2005-03 | 10.67 |
| 2005-02 | 8.28 |
| 2005-01 | 9.91 |
| 2004-12 | 10.63 |
| 2004-11 | 9.88 |
| 2004-10 | 8.77 |
| 2004-09 | 10.72 |
| 2004-08 | 9.78 |
| 2004-07 | 7.31 |
| 2004-06 | 8.61 |
| 2004-05 | 8.67 |
| 2004-04 | 8.28 |
| 2004-03 | 7.56 |
| 2004-02 | 7.25 |
| 2004-01 | 7.85 |
| 2003-12 | 9.49 |
| 2003-11 | 14.40 |
| 2003-10 | 8.46 |
| 2003-09 | 7.93 |
| 2003-08 | 7.52 |
| 2003-07 | 6.97 |
| 2003-06 | 6.93 |
| 2003-05 | 6.28 |
| 2003-04 | 7.20 |
| 2003-03 | 6.46 |
| 2003-02 | 5.78 |
| 2003-01 | 5.95 |
| 2002-12 | 7.19 |
| 2002-11 | 6.20 |
| 2002-10 | 6.51 |
| 2002-09 | 6.19 |
| 2002-08 | 5.40 |
| 2002-07 | 5.01 |
| 2002-06 | 4.91 |
| 2002-05 | 5.45 |
| 2002-04 | 5.31 |
| 2002-03 | 5.37 |
| 2002-02 | 5.18 |
| 2002-01 | 5.37 |
| 2001-12 | 5.85 |
| 2001-11 | 5.54 |
| 2001-10 | 4.88 |
| 2001-09 | 5.50 |
| 2001-08 | 4.49 |
| 2001-07 | 4.33 |
| 2001-06 | 5.01 |
| 2001-05 | 4.99 |
| 2001-04 | 5.02 |
| 2001-03 | 5.60 |
| 2001-02 | 4.76 |
| 2001-01 | 4.03 |
| 2000-12 | 4.98 |
| 2000-11 | 4.73 |
| 2000-10 | 4.62 |
| 2000-09 | 4.91 |
| 2000-08 | 4.50 |
| 2000-07 | 3.65 |
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