Private Vehicle Occupancy for the United States:  1990 and 1980 Census
+--------------------------------+---------------------+---------------------+
|                                |     1990 Census     |     1980 Census     |
|                                +---------------------+---------------------+
|Private Vehicle Occupancy       |     Number  Percent |     Number  Percent |
+--------------------------------+---------------------+---------------------+
|Workers 16 years and over.......|115,070,274      ... | 96,617,296      ... |
|                                |                     |                     |
|Car, truck, or van..............| 99,592,932    100.0 | 81,258,496    100.0 |
| Drove alone....................| 84,215,298     84.6 | 62,193,449     76.5 |
| Carpooled......................| 15,377,634     15.4 | 19,065,047     23.5 |
|   In 2-person carpool..........| 12,078,175     12.1 | 13,303,701     16.4 |
|   In 3-person carpool..........|  2,001,378      2.0 |  3,360,781      4.1 |
|   In 4-person carpool..........|    702,222      0.7 |  1,400,527      1.7 |
|   In 5-person carpool 1/.......|    208,597      0.2 |  1,000,038      1.2 |
|   In 6-person carpool..........|     97,379      0.1 |        N/A      N/A |
|   In 7-9 person carpool........|    114,142      0.1 |        N/A      N/A |
|   In 10-or-more-person carpool.|    175,741      0.2 |        N/A      N/A |
|Other means.....................| 15,477,342      ... | 15,358,800      ... |
|                                |                     |                     |
|Persons per car, truck, or van..|       1.09          |       1.15          |
+--------------------------------+---------------------+---------------------+
 ...  Not applicable.
 N/A  Not available.
 1/ This category was "5-or-more-person carpool" in 1980.

 Source:  1990 Census of Population, STF3C.
          1980 Census of Population, General Social and Economic
            Characteristics, United States Summary.
 Contact:  Journey-to-Work and Migration Statistics Branch, Population
           Division, U.S. Bureau of the Census, (301) 457-2454.