| Period | Total | Business | Non-Business | | 2007 | 11,852 | 397 | 11,455 | | 2006 | 9,564 | 276 | 9,288 | | 2005 | 30,568 | 426 | 30,142 | | 2004 | 24,263 | 376 | 23,887 | | 2003 | 24,307 | 429 | 23,878 | | 2002 | 23,546 | 282 | 23,264 | | 2001 | 21,484 | 290 | 21,194 | | 2000 | 16,784 | 261 | 16,523 | | 1999 | 16,533 | 295 | 16,238 | | 1998 | 17,052 | 408 | 16,644 | | 1997 | 15,643 | 539 | 15,104 | | 1996 | 13,194 | 486 | 12,708 | | 1995 | 9,378 | 422 | 8,956 | | 1994 | 6,840 | 373 | 6,467 | | 1993 | 7,000 | 444 | 6,556 | | 1992 | 8,253 | 577 | 7,676 | | 1991 | 8,315 | 497 | 7,818 | | 1990 | 7,062 | 467 | 6,595 | | 1989 | 6,388 | 454 | 5,934 | | 1988 | 6,051 | 552 | 5,499 | | 1987 | 5,726 | 713 | 5,013 | | 1986 | 5,003 | 593 | 4,410 | | 1985 | 4,137 | 599 | 3,538 | | 1984 | 3,720 | 743 | 2,977 | | 1983 | 2,814 | 413 | 2,401 | | 1982 | 2,908 | 497 | 2,411 | | 1981 | 2,736 | 295 | 2,441 | | 1980 | 2,525 | 264 | 2,261 |
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