|  | 13 yr | 15 yr | 17 yr | Total |
---|---|---|---|---|---|
By trying to persuade their children not to smoke | 1987 | 92 | 86 | 79 | 86 |
 | 1994 | 94 | 90 | 89 | 91 |
 | 2003 | 96 | 93 | 92 | 94 |
By not smoking themselves | 1987 | 86 | 86 | 86 | 86 |
 | 1994 | 86 | 86 | 89 | 87 |
 | 2003 | 88 | 86 | 88 | 87 |
By not allowing the children to smoke at home | 1987 | 63 | 64 | 59 | 62 |
 | 1994 | 84 | 82 | 76 | 81 |
 | 2003 | 87 | 87 | 84 | 86 |
By forbidding their children to smoke | 1987 | 45 | 22 | 12 | 26 |
 | 1994 | 54 | 33 | 23 | 37 |
 | 2003 | 76 | 58 | 44 | 59 |
By reducing their children's pocket money* | 1987 | - | - | - | - |
 | 1994 | 37 | 23 | 17 | 26 |
 | 2003 | 53 | 39 | 32 | 42 |