During the past 30 days, how many times have you driven
when you've had perhaps too much to drink?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Limit
Upper 95% Confidence
Limit
None / Did not drink in past 30 days 8411 97.8 0.3 97.2 98.4
One 68 1.4 0.2 0.9 1.8
Two 24 0.6 0.2 0.2 0.9
Three or more 13 0.2 0.1 0.1 0.4

Among all respondents, excluding unknowns and refusals.
 
Denominator adjusted to reflect overal prevalence in the population.