The following data show the men's smoking rate in Japan from 1989 to 2014. Unit is %. Age 20～29 30～39 40～49 50～59 60～69 70 & over Average 1989 62.3 65.4 59.5 53.3 50.4 34.5 55.3 1990 52.9 63.3 56.6 50.1 51.8 38.8 53.1 1991 48.3 57.2 5…