The major holdings of the Data Library consist of government data in machine-readable form. This continually expanding collection includes data products from recent decennial Censuses of Population and Housing, including 1990, Current Population Surveys and significant data produced by the Bureau of Labor Statistics, the Bureau of Economic Analysis and the National Center for Health Statistics among others.
| year | know about, used |
Male | Female | AB | BSE |
| 1989 | n.a. | n.a. | n.a. | n.a. | n.a. |
| 1990 | 11% , 02% | 11% , 02% | 08% , 03% | 09% , 03% | 17% , 01% |
| 1991 | 09% , 05% | 11% , 07% | 06% , 01% | 06% , 04% | 16% , 08% |
| 1992 | 11% , 02% | 13% , 02% | 07% , 02% | 10% , 02% | 15% , 03% |
| 1993 | 10% , 04% | 13% , 05% | 06% , 03% | 09% , 13% | 15% , 06% |
| 1994 | 10% , 03% | 12% , 04% | 07% , 02% | 08% , 03% | 18% , 03% |
| 1995 | 13% , 07% | 15% , 10% | 10% , 03% | 11% , 06% | 17% , 10% |