Lifestyles and preventive practices. Absolute figures Average age at beginning to use tobacco of daily smokers, by sex and nationality. Average and standard deviation. Population aged 16 years old and over that smokes daily Units: average and standard deviation Average Standard deviation BOTH SEXES Total 17.35 4.55 Spanish 17.24 4.53 Foreign 18.21 4.61 No data recorded 18.35 4.87 MALES Total 17.04 4.14 Spanish 16.91 4.08 Foreign 18.04 4.38 No data recorded 19.26 5.21 FEMALES Total 17.78 5.05 Spanish 17.70 5.07 Foreign 18.44 4.88 No data recorded 16.33 3.24 Notes: 1) Population aged 16 years old and over that smokes daily The symbol '.' shall be deemed as data which cannot be provided since it may be affected by sampling errors. The symbol '..' shall be deemed as data which is not collected. The symbol '...' shall be deemed as an 'error of division by zero'. Source: Ministry of Health and Consumption and INE