| Past 30-Day Exposure (number of days) | Secondhand Smoke (SHS) | Secondhand Aerosol (SHA) | Total Students (SHS) (Weighted N) | Total Students (SHA) (Weighted N) |
|---|---|---|---|---|
| 1–2 days | 47.3 | 47.6 | 6,220,000 | 3,170,000 |
| 3–9 days | 30.0 | 30.0 | 3,940,000 | 2,000,000 |
| 10–29 days | 12.9 | 13.3 | 1,700,000 | 880,000 |
| 30 days | 9.8 | 9.1 | 1,280,000 | 600,000 |
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