| Value | Category | Cases | |
|---|---|---|---|
| 1 | I did not use public transportation during the past 7 days | 1353 |
45%
|
| 2 | I used public transportation but no one smoked in my presence | 1272 |
42.3%
|
| 3 | 1 to 2 days | 219 |
7.3%
|
| 4 | 3 to 4 days | 58 |
1.9%
|
| 5 | 5 to 6 days | 54 |
1.8%
|
| 6 | 7 days | 52 |
1.7%
|
| Sysmiss | 22 |