| Value | Category | Cases | |
|---|---|---|---|
| 1 | I did not use public transportation during the past 7 days | 1757 |
41.2%
|
| 2 | I used public transportation but no one smoked in my presence | 1929 |
45.3%
|
| 3 | 1 to 2 days | 355 |
8.3%
|
| 4 | 3 to 4 days | 81 |
1.9%
|
| 5 | 5 to 6 days | 74 |
1.7%
|
| 6 | 7 days | 65 |
1.5%
|
| Sysmiss | 40 |