Table 2.
Prevalence of don’t know response by year
| ||
---|---|---|
Survey year | % Don’t know responses | Estimated US adult don’t know responders |
1993 | 2.4 | 5,049,888 |
1994 | 1.7 | 3,606,074 |
1995 | 1.6 | 3,420,480 |
1996 | 1.3 | 2,800,356 |
1997 | 1.3 | 2,824,640 |
1998 | 1.1 | 2,412,674 |
1999 | 1.2 | 2,657,208 |
2000 | 1.1 | 2,469,720 |