Licensed Drivers, Population, and Motor Vehicles
| Year | Vehicles | Drivers | Driving Age Population (1,000) | Drivers per Driving Age Population | Drivers per Motor Vehicle | Motor Vehicle per Driver |
|---|---|---|---|---|---|---|
| 1950 | 49,162 | 62,193 | 108,528 | 57.3 | 1.27 | 0.79 |
| 1955 | 62,689 | 74,686 | 114,654 | 65.1 | 1.19 | 0.84 |
| 1960 | 73,858 | 87,253 | 120,780 | 72.2 | 1.18 | 0.85 |
| 1965 | 90,358 | 98,502 | 131,031 | 75.2 | 1.09 | 0.92 |
| 1970 | 108,418 | 111,543 | 141,283 | 79.0 | 1.03 | 0.97 |
| 1975 | 132,949 | 129,815 | 156,618 | 82.9 | 0.98 | 1.02 |
| 1980 | 155,796 | 145,299 | 171,953 | 84.5 | 0.93 | 1.07 |
| 1985 | 171,654 | 156,868 | 183,009 | 85.7 | 0.91 | 1.09 |
| 1990 | 188,655 | 167,015 | 191,412 | 87.3 | 0.89 | 1.13 |
| 1991 | 188,372 | 168,995 | 193,751 | 87.2 | 0.90 | 1.11 |
| 1992 | 190,362 | 173,125 | 195,672 | 88.5 | 0.91 | 1.10 |
| 1993 | 194,063 | 173,149 | 197,663 | 87.6 | 0.89 | 1.12 |
| 1994 | 198,045 | 175,403 | 199,400 | 88.0 | 0.89 | 1.13 |
| 1995 | 201,530 | 176,628 | 201,240 | 87.8 | 0.88 | 1.14 |
| 1996 | 206,570 | 179,539 | 203,787 | 88.1 | 0.87 | 1.15 |
| 1997 | 207,754 | 182,709 | 205,838 | 88.8 | 0.88 | 1.14 |
| 1998 | 211,617 | 184,980 | 208,277 | 88.8 | 0.87 | 1.14 |
| 1999 | 216,309 | 187,170 | 210,433 | 88.9 | 0.87 | 1.16 |
| 2000 | 221,309 | 190,265 | 217,109 | 87.6 | 0.86 | 1.16 |
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