Things like smoke, automobile exhaust, and chemicals can cause outdoor air
pollution. In the past 12 months have you had an illness or symptom
that you think was caused by pollution in the air outdoors?

Response Unweighted Frequency Weighted Percentage Standard Error Lower 95% Confidence
Upper 95% Confidence
Yes 800 8.7 0.4 8.0 9.4
No 7774 91.3 0.4 90.6 92.0

Among all respondents, excluding unknowns and refusals.