Age NS EX SS RS QU
15 63.65 12.81 14.74 7.84 0.66
16 55.21 11.70 18.85 12.55 1.39
17 50.10 12.65 22.81 12.33 1.82
18 45.17 12.54 27.68 12.12 2.20
19 40.19 12.64 32.40 11.97 2.49
20 36.75 12.13 35.80 12.38 2.63
21 35.45 10.96 36.64 13.53 3.12
Table 4: Smoking behavior if 20% reduction of σ2 (a ) a from an intervention tobacco control program.