| year | Car | Bus | Rail | Air | estimate | area |
|---|---|---|---|---|---|---|
| 1995 | 3930 | 499 | 351 | 346 | ||
| 1996 | 3996 | 504 | 349 | 366 | ||
| 1997 | 4080 | 504 | 351 | 390 | ||
| 1998 | 4185 | 512 | 351 | 409 | ||
| 1999 | 4300 | 514 | 359 | 425 | ||
| 2000 | 4372 | 517 | 371 | 457 | ||
| 2001 | 4477 | 519 | 373 | 453 | ||
| 2002 | 4571 | 518 | 366 | 445 | ||
| 2003 | 4613 | 519 | 362 | 463 | ||
| 2004 | 4683 | 522 | 368 | 493 | ||
| 2005 | 4630 | 523 | 377 | 527 | ||
| 2006 | 4693 | 519 | 391 | 549 | ||
| 2007 | 4762 | 533 | 396 | 572 | ||
| 2008 | 4789 | 535 | 411 | 561 | ||
| 2009 | 4866 | 515 | 403 | 522 | ||
| 2010 | 4832 | 509 | 404 | 522 | ||
| 2011 | 4822 | 512 | 407 | 575 | ||
| 2012* | 4608 | 488 | 401 | 556 |