| 年份 | X1 | X2 | X3 | X4 | X5 | X6 | X7 | X8 |
| 2004 | 35398 | 705 | 15717 | 97.9 | 97.7 | 100 | 98.7 | 2 |
| 2005 | 37511 | 725 | 18920 | 98.4 | 97.9 | 99.7 | 98.5 | 2 |
| 2006 | 42073 | 1118 | 24628 | 98.7 | 98.6 | 100 | 98.7 | 3 |
| 2007 | 50047 | 1394 | 18572 | 98.9 | 98.3 | 100 | 99 | 3 |
| 2008 | 53593 | 1824 | 23064 | 100.0 | 98.3 | 100 | 99.3 | 3 |