| 年月 | 单位：千美元 |
| 2006-12 | 412249.00 |
| 2006-11 | 425704.00 |
| 2006-10 | 383282.00 |
| 2006-09 | 422283.00 |
| 2006-08 | 446263.00 |
| 2006-07 | 381687.00 |
| 2006-06 | 361515.00 |
| 2006-05 | 369934.00 |
| 2006-04 | 403207.00 |
| 2006-03 | 441175.00 |
| 2006-02 | 255736.00 |
| 2006-01 | 300486.00 |
| 2005-12 | 351520.00 |
| 2005-11 | 347951.00 |
| 2005-10 | 328941.00 |
| 2005-09 | 329252.00 |
| 2005-08 | 294937.00 |
| 2005-07 | 283941.00 |
| 2005-06 | 248273.00 |
| 2005-05 | 164503.00 |
| 2005-04 | 185367.00 |
| 2005-03 | 201377.00 |
| 2005-02 | 123519.00 |
| 2005-01 | 29010.00 |
| 2004-12 | 38851.00 |
| 2004-11 | 67963.00 |
| 2004-10 | 33439.00 |
| 2004-09 | 50277.00 |
| 2004-08 | 55995.00 |
| 2004-07 | 50414.00 |
| 2004-06 | 49748.00 |
| 2004-05 | 45110.00 |
| 2004-04 | 54362.00 |
| 2004-03 | 53075.00 |
| 2004-02 | 45046.00 |
| 2004-01 | 28126.00 |
| 2003-12 | 44926.00 |
| 2003-11 | 37128.00 |
| 2003-10 | 33041.00 |
| 2003-09 | 49332.00 |
| 2003-08 | 21111.00 |
| 2003-07 | 49471.00 |
| 2003-06 | 46542.00 |
| 2003-05 | 48623.00 |
| 2003-04 | 54719.00 |
| 2003-03 | 63629.00 |
| 2003-02 | 59763.00 |
| 2003-01 | 79919.00 |
| 2002-12 | 51871.00 |
| 2002-11 | 57600.00 |
| 2002-10 | 74926.00 |
| 2002-09 | 73199.00 |
| 2002-08 | 72026.00 |
| 2002-07 | 98711.00 |
| 2002-06 | 64212.00 |
| 2002-05 | 83494.00 |
| 2002-04 | 72551.00 |
| 2002-03 | 73213.00 |
| 2002-02 | 66506.00 |
| 2002-01 | 71427.00 |
| 2001-12 | 63797.00 |
| 2001-11 | 76076.00 |
| 2001-10 | 64896.00 |
| 2001-09 | 73460.00 |
| 2001-08 | 87440.00 |
| 2001-07 | 72207.00 |
| 2001-06 | 61447.00 |
| 2001-05 | 50012.00 |
| 2001-04 | 101319.00 |
| 2001-03 | 91139.00 |
| 2001-02 | 66290.00 |
| 2001-01 | 61868.00 |
| 2000-12 | 39992.00 |
| 2000-11 | 79985.00 |
| 2000-10 | 52070.00 |
| 2000-09 | 65894.00 |
| 2000-08 | 82554.00 |
| 2000-07 | 80665.00 |
| 2000-06 | 65501.00 |
| 2000-05 | 77660.00 |
| 2000-04 | 48814.00 |
| 2000-03 | 71086.00 |
| 2000-02 | 31127.00 |
| 2000-01 | 53847.00 |
| 1999-12 | 59353.00 |
| 1999-11 | 39763.00 |
| 1999-10 | 72687.00 |
| 1999-09 | 55226.00 |
| 1999-08 | 50318.00 |
| 1999-07 | 62733.00 |
| 1999-06 | 31208.00 |
| 1999-05 | 52323.00 |
| 1999-04 | 44537.00 |
| 1999-03 | 55401.00 |
| 1999-02 | 22472.00 |
| 1999-01 | 42997.00 |
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