Year: 1990, Licensed Drivers:484,803, Population: 669063
Year: 1991, Licensed Drivers:495,281, Population: 680495
Year: 1992, Licensed Drivers:501,397, Population: 690178
Year: 1993, Licensed Drivers:506,274, Population: 699475
Year: 1994, Licensed Drivers:513,406, Population: 708416
Year: 1995, Licensed Drivers:524,992, Population: 718265
Year: 1996, Licensed Drivers:532,218, Population: 727090
Year: 1997, Licensed Drivers:539,610, Population: 735143
Year: 1998, Licensed Drivers:548,322, Population: 743603
Year: 1999, Licensed Drivers:552,005, Population: 753538