However, restrictions did have an effect on adult quit rates, with its use declining to the point that by 2004, nearly half of all Americans who had ever smoked had quit.
しかし、規制は成人の禁煙率に影響を及ぼし、2004年の時点でそのポイントは下降、それまでたばこを吸っていたアメリカ人のうち、ほぼ半分がたばこを吸うことをやめた。