- 1987 to 1987 70,801
- 1988 to 1988 74,159
- 1989 to 1989 76,693
- 1990 to 1990 81,558
- 1991 to 1991 81,576
- 1992 to 1992 85,465
- 1993 to 1993 87,447
- 1994 to 1994 92,990
- 1995 to 1995 106,282
- 1996 to 1996 114,504
- 1997 to 1997 118,353
- 1998 to 1998 120,549
- 1999 to 1999 115,651