| 季度 | 单位：万吨 |
| 2011-12 | 购买后可见 » |
| 2011-09 | 购买后可见 » |
| 2011-06 | 购买后可见 » |
| 2011-03 | 购买后可见 » |
| 2010-12 | 购买后可见 » |
| 2010-09 | 购买后可见 » |
| 2010-06 | 购买后可见 » |
| 2010-03 | 购买后可见 » |
| 2009-12 | 购买后可见 » |
| 2009-09 | 购买后可见 » |
| 2009-06 | 购买后可见 » |
| 2009-03 | 购买后可见 » |
| 2008-12 | 购买后可见 » |
| 2008-09 | 购买后可见 » |
| 2008-06 | 购买后可见 » |
| 2008-03 | 购买后可见 » |
| 2007-12 | 购买后可见 » |
| 2007-09 | 购买后可见 » |
| 2007-06 | 购买后可见 » |
| 2007-03 | 购买后可见 » |
| 2006-12 | 购买后可见 » |
| 2006-09 | 购买后可见 » |
| 2006-06 | 购买后可见 » |
| 2006-03 | 购买后可见 » |
| 2005-12 | 购买后可见 » |
| 2005-09 | 购买后可见 » |
| 2005-06 | 购买后可见 » |
| 2005-03 | 购买后可见 » |
| 2004-12 | 购买后可见 » |
| 2004-09 | 购买后可见 » |
| 2004-06 | 购买后可见 » |
| 2004-03 | 购买后可见 » |
| 2003-12 | 购买后可见 » |
| 2003-09 | 购买后可见 » |
| 2003-06 | 购买后可见 » |
| 2003-03 | 购买后可见 » |
| 2002-12 | 7.80 |
| 2002-09 | 5.30 |
| 2002-06 | 3.40 |
| 2002-03 | 1.10 |
| 2001-12 | 6.10 |
| 2001-09 | 4.30 |
| 2001-06 | 4.00 |
| 2001-03 | 1.90 |
| 2000-12 | 8.90 |
| 2000-09 | 6.80 |
| 2000-06 | 1.70 |
| 2000-03 | 2.70 |
| 1999-12 | 9.50 |
| 1999-09 | 8.90 |
| 1999-06 | 6.00 |
| 1999-03 | 2.20 |
| 1998-12 | 14.66 |
| 1998-09 | 11.57 |
| 1998-06 | 8.56 |
| 1998-03 | 4.36 |
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