| 年月 | 单位：% |
| 2010-12 | 43.80 |
| 2010-11 | 45.00 |
| 2010-10 | 44.23 |
| 2010-09 | 42.70 |
| 2010-08 | 39.80 |
| 2010-07 | 35.10 |
| 2010-06 | 36.50 |
| 2010-05 | 33.52 |
| 2010-04 | 31.70 |
| 2010-03 | 47.50 |
| 2010-02 | 60.01 |
| 2010-01 | 68.57 |
| 2009-12 | 25.80 |
| 2009-11 | 24.20 |
| 2009-10 | 19.20 |
| 2009-09 | 18.72 |
| 2009-08 | 18.10 |
| 2009-07 | 21.59 |
| 2009-06 | 25.34 |
| 2009-05 | 24.64 |
| 2009-04 | 27.57 |
| 2009-03 | 16.90 |
| 2009-02 | 33.60 |
| 2009-01 | 43.73 |
| 2008-12 | 28.50 |
| 2008-11 | 30.90 |
| 2008-10 | 38.70 |
| 2008-09 | 38.20 |
| 2008-08 | 37.40 |
| 2008-07 | 39.30 |
| 2008-06 | 40.90 |
| 2008-05 | 32.30 |
| 2008-04 | 17.80 |
| 2008-03 | 7.30 |
| 2008-02 | 10.90 |
| 2007-12 | 53.90 |
| 2007-11 | 57.10 |
| 2007-10 | 56.70 |
| 2007-09 | 60.10 |
| 2007-08 | 62.50 |
| 2007-07 | 62.40 |
| 2007-06 | 55.00 |
| 2007-05 | 58.60 |
| 2007-04 | 70.50 |
| 2007-03 | 88.20 |
| 2007-02 | 75.80 |
| 2007-01 | 82.86 |
| 2003-12 | 161880.53 |
| 2003-11 | 147168.96 |
| 2003-10 | 131604.59 |
| 2003-09 | 116722.78 |
| 2003-08 | 102451.62 |
| 2003-07 | 88777.05 |
| 2003-06 | 75439.65 |
| 2003-05 | 63053.60 |
| 2003-04 | 48420.11 |
| 2003-03 | 35486.18 |
| 2003-02 | 21673.68 |
| 2003-01 | 8876.89 |
| 2002-12 | 135846.18 |
| 2002-11 | 120611.29 |
| 2002-10 | 108253.96 |
| 2002-09 | 96969.26 |
| 2002-08 | 86694.40 |
| 2002-07 | 75785.43 |
| 2002-06 | 65817.55 |
| 2002-05 | 55070.60 |
| 2002-04 | 43224.22 |
| 2002-03 | 31891.94 |
| 2002-02 | 19604.65 |
| 2002-01 | 8691.52 |
| 2001-12 | 132424.62 |
| 2001-11 | 98192.60 |
| 2001-10 | 88553.81 |
| 2001-09 | 76971.91 |
| 2001-08 | 69319.35 |
| 2001-07 | 60358.63 |
| 2001-06 | 52104.57 |
| 2001-05 | 42635.18 |
| 2001-04 | 32126.49 |
| 2001-03 | 22494.43 |
| 2001-02 | 13183.62 |
| 2001-01 | 6686.20 |
| 2000-12 | 116070.60 |
| 2000-11 | 106957.30 |
| 2000-10 | 97058.40 |
| 2000-09 | 88549.37 |
| 2000-08 | 77824.84 |
| 2000-07 | 68304.32 |
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