- 1988 to 1988 73,671
- 1989 to 1989 76,341
- 1990 to 1990 81,099
- 1991 to 1991 81,243
- 1992 to 1992 85,221
- 1993 to 1993 87,253
- 1994 to 1994 92,793
- 1995 to 1995 106,086
- 1996 to 1996 114,413
- 1997 to 1997 118,318
- 1998 to 1998 120,586
- 1999 to 1999 115,669
- 2000 to 2000 120,628