| 年月 | 单位：千美元 |
| 2007-12 | 36253.00 |
| 2007-11 | 34644.00 |
| 2007-10 | 32501.00 |
| 2007-09 | 29990.00 |
| 2007-08 | 27681.00 |
| 2007-07 | 23925.00 |
| 2007-06 | 21854.00 |
| 2007-05 | 18304.00 |
| 2007-04 | 14230.00 |
| 2007-03 | 10430.00 |
| 2007-02 | 7571.00 |
| 2007-01 | 3355.00 |
| 2006-12 | 44155.00 |
| 2006-11 | 39777.00 |
| 2006-10 | 37198.00 |
| 2006-09 | 34650.00 |
| 2006-08 | 33127.00 |
| 2006-07 | 29683.00 |
| 2006-06 | 26907.00 |
| 2006-05 | 24559.00 |
| 2006-04 | 20958.00 |
| 2006-03 | 15028.00 |
| 2006-02 | 7355.00 |
| 2006-01 | 3398.00 |
| 2005-12 | 37135.00 |
| 2005-11 | 34717.00 |
| 2005-10 | 31656.00 |
| 2005-09 | 28903.00 |
| 2005-08 | 25586.00 |
| 2005-07 | 22804.00 |
| 2005-06 | 20856.00 |
| 2005-05 | 18624.00 |
| 2005-04 | 16339.00 |
| 2005-03 | 10319.00 |
| 2005-02 | 6536.00 |
| 2005-01 | 3063.00 |
| 2004-12 | 43869.00 |
| 2004-11 | 38969.00 |
| 2004-10 | 32967.00 |
| 2004-09 | 29419.00 |
| 2004-08 | 26119.00 |
| 2004-07 | 22998.00 |
| 2004-06 | 19741.00 |
| 2004-05 | 16233.00 |
| 2004-04 | 12181.00 |
| 2004-03 | 7583.00 |
| 2004-02 | 3466.00 |
| 2004-01 | 1549.00 |
| 2003-12 | 28685.00 |
| 2003-11 | 25102.00 |
| 2003-10 | 22364.00 |
| 2003-09 | 19551.00 |
| 2003-08 | 18063.00 |
| 2003-07 | 16212.00 |
| 2003-06 | 13864.00 |
| 2003-05 | 11432.00 |
| 2003-04 | 9211.00 |
| 2003-03 | 6203.00 |
| 2003-02 | 4430.00 |
| 2003-01 | 2969.00 |
| 2002-12 | 46722.00 |
| 2002-11 | 41814.00 |
| 2002-10 | 37152.00 |
| 2002-09 | 33902.00 |
| 2002-08 | 30856.00 |
| 2002-07 | 27710.00 |
| 2002-06 | 24662.00 |
| 2002-05 | 21297.00 |
| 2002-04 | 17941.00 |
| 2002-03 | 13293.00 |
| 2002-02 | 7875.00 |
| 2002-01 | 4929.00 |
| 2001-12 | 47064.00 |
| 2001-11 | 44235.00 |
| 2001-10 | 41885.00 |
| 2001-09 | 39077.00 |
| 2001-08 | 36506.00 |
| 2001-07 | 34271.00 |
| 2001-06 | 31110.00 |
| 2001-05 | 26318.00 |
| 2001-04 | 22150.00 |
| 2001-03 | 17091.00 |
| 2001-02 | 8707.00 |
| 2001-01 | 3543.00 |
| 2000-12 | 61765.00 |
| 2000-11 | 58035.00 |
| 2000-10 | 54988.00 |
| 2000-09 | 51906.00 |
| 2000-08 | 48903.00 |
| 2000-07 | 43027.00 |
| 2000-06 | 35778.00 |
| 2000-05 | 30298.00 |
| 2000-04 | 23750.00 |
| 2000-03 | 16530.00 |
| 2000-02 | 7692.00 |
| 2000-01 | 2827.00 |
| 1999-12 | 54885.00 |
| 1999-11 | 51509.00 |
| 1999-10 | 47177.00 |
| 1999-09 | 39627.00 |
| 1999-08 | 31480.00 |
| 1999-07 | 26287.00 |
| 1999-06 | 21047.00 |
| 1999-05 | 17371.00 |
| 1999-04 | 13699.00 |
| 1999-03 | 10887.00 |
| 1999-02 | 7396.00 |
| 1999-01 | 2589.00 |
| 1998-12 | 40443.00 |
| 1998-11 | 36835.00 |
| 1998-10 | 34947.00 |
| 1998-09 | 33441.00 |
| 1998-08 | 30744.00 |
| 1998-07 | 27337.00 |
| 1998-06 | 24368.00 |
| 1998-05 | 21870.00 |
| 1998-04 | 18885.00 |
| 1998-03 | 14863.00 |
| 1998-02 | 7943.00 |
| 1998-01 | 3177.00 |
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