Lifestyles and preventive practices. Absolute figures 
Average age at beginning to use tobacco of ex-smokers, by sex and social class of the main breadwinner. Average and standard deviation. Population aged 16 years old and over that does not currently smoke but has smoked previously
Units: average and standard deviation

	Average	Standard deviation	
BOTH SEXES	
    Total	17.16	4.49	
    I: Executives of Public Administrations and of companies with 10 or more employees, and professions associated with university degrees	17.56	3.96	
    II: Executives of companies with fewer than 10 employees, and professions associated  with intermediate degrees. Advanced technicians. Artists and sportspersons	17.58	4.70	
    III: Administrative type employees and Administrative and financial support professionals. Personal services and Security workers. Freelance workers. Supervisors of manual workers	17.17	4.30	
    IVa: Skilled manual workers	16.95	4.78	
    IVb: Semi-skilled manual workers	16.97	4.18	
    V: Unskilled workers	16.89	4.53	
    No data recorded	17.85	5.61	
MALES	
    Total	16.80	4.27	
    I: Executives of Public Administrations and of companies with 10 or more employees, and professions associated with university degrees	17.24	3.53	
    II: Executives of companies with fewer than 10 employees, and professions associated  with intermediate degrees. Advanced technicians. Artists and sportspersons	17.42	4.91	
    III: Administrative type employees and Administrative and financial support professionals. Personal services and Security workers. Freelance workers. Supervisors of manual workers	16.81	3.90	
    IVa: Skilled manual workers	16.59	4.52	
    IVb: Semi-skilled manual workers	16.69	4.02	
    V: Unskilled workers	16.54	4.46	
    No data recorded	16.55	4.16	
FEMALES	
    Total	17.88	4.84	
    I: Executives of Public Administrations and of companies with 10 or more employees, and professions associated with university degrees	18.04	4.48	
    II: Executives of companies with fewer than 10 employees, and professions associated  with intermediate degrees. Advanced technicians. Artists and sportspersons	17.82	4.36	
    III: Administrative type employees and Administrative and financial support professionals. Personal services and Security workers. Freelance workers. Supervisors of manual workers	17.85	4.91	
    IVa: Skilled manual workers	17.86	5.27	
    IVb: Semi-skilled manual workers	17.50	4.41	
    V: Unskilled workers	17.87	4.60	
    No data recorded	20.26	7.00	
Notes:
1) Population aged 16 years old and over that does not currently smoke but that has smoked  before
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