| 年月 | 单位：亿件 |
| 2010-12 | 34.40 |
| 2010-11 | 33.00 |
| 2010-10 | 32.26 |
| 2010-09 | 25.50 |
| 2010-08 | 22.90 |
| 2010-07 | 22.50 |
| 2010-06 | 23.60 |
| 2010-05 | 21.53 |
| 2010-04 | 17.50 |
| 2010-03 | 15.60 |
| 2010-02 | 9.74 |
| 2010-01 | 13.34 |
| 2009-12 | 29.55 |
| 2009-11 | 24.26 |
| 2009-10 | 22.32 |
| 2009-09 | 20.52 |
| 2009-08 | 17.78 |
| 2009-07 | 16.37 |
| 2009-06 | 18.12 |
| 2009-05 | 15.71 |
| 2009-04 | 12.48 |
| 2009-03 | 13.59 |
| 2009-02 | 8.17 |
| 2009-01 | 11.20 |
| 2008-12 | 18.25 |
| 2008-11 | 15.93 |
| 2008-10 | 13.42 |
| 2008-09 | 12.59 |
| 2008-08 | 15.13 |
| 2008-07 | 12.74 |
| 2008-06 | 14.91 |
| 2008-05 | 12.43 |
| 2008-04 | 11.29 |
| 2008-03 | 12.57 |
| 2008-02 | 7.24 |
| 2008-01 | 9.08 |
| 2007-12 | 16.34 |
| 2007-11 | 13.84 |
| 2007-10 | 12.26 |
| 2007-09 | 13.02 |
| 2007-08 | 13.72 |
| 2007-07 | 11.67 |
| 2007-06 | 12.93 |
| 2007-05 | 11.43 |
| 2007-04 | 10.04 |
| 2007-03 | 8.79 |
| 2007-02 | 6.27 |
| 2007-01 | 8.20 |
| 2006-12 | 12.44 |
| 2006-11 | 10.83 |
| 2006-10 | 9.56 |
| 2006-09 | 10.32 |
| 2006-08 | 9.36 |
| 2006-07 | 9.76 |
| 2006-06 | 10.68 |
| 2006-05 | 9.52 |
| 2006-04 | 9.71 |
| 2006-03 | 9.35 |
| 2006-02 | 6.35 |
| 2006-01 | 7.43 |
| 2005-12 | 10.95 |
| 2005-11 | 10.11 |
| 2005-10 | 9.06 |
| 2005-09 | 8.48 |
| 2005-08 | 8.59 |
| 2005-07 | 8.80 |
| 2005-06 | 9.09 |
| 2005-05 | 7.53 |
| 2005-04 | 6.61 |
| 2005-03 | 6.57 |
| 2005-02 | 5.34 |
| 2005-01 | 6.48 |
| 2004-12 | 10.46 |
| 2004-11 | 8.34 |
| 2004-10 | 7.35 |
| 2004-09 | 7.30 |
| 2004-08 | 7.32 |
| 2004-07 | 7.60 |
| 2004-06 | 7.75 |
| 2004-05 | 7.46 |
| 2004-04 | 7.66 |
| 2004-03 | 7.23 |
| 2004-02 | 5.54 |
| 2004-01 | 6.38 |
| 2003-12 | 8.81 |
| 2003-11 | 8.28 |
| 2003-10 | 7.92 |
| 2003-09 | 8.34 |
| 2003-08 | 7.89 |
| 2003-07 | 7.96 |
| 2003-06 | 10.94 |
| 2003-05 | 6.84 |
| 2003-04 | 7.53 |
| 2003-03 | 7.22 |
| 2003-02 | 6.42 |
| 2003-01 | 6.83 |
| 2002-12 | 9.71 |
| 2002-11 | 8.56 |
| 2002-10 | 10.13 |
| 2002-09 | 7.72 |
| 2002-08 | 7.59 |
| 2002-07 | 7.57 |
| 2002-06 | 7.78 |
| 2002-05 | 7.44 |
| 2002-04 | 7.23 |
| 2002-03 | 6.61 |
| 2002-02 | 5.27 |
| 2002-01 | 6.27 |
| 2001-12 | 7.46 |
| 2001-11 | 6.63 |
| 2001-10 | 6.16 |
| 2001-09 | 6.29 |
| 2001-08 | 5.96 |
| 2001-07 | 5.90 |
| 2001-06 | 6.48 |
| 2001-05 | 6.28 |
| 2001-04 | 6.10 |
| 2001-03 | 6.07 |
| 2001-02 | 5.69 |
| 2001-01 | 5.16 |
| 2000-12 | 6.85 |
| 2000-11 | 5.96 |
| 2000-10 | 5.99 |
| 2000-09 | 6.38 |
| 2000-08 | 5.40 |
| 2000-07 | 5.42 |
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