Table 1.

Descriptive statistics of the study population in 2005, 2008, 2011 and 2014 ^a

	2005		2008		2011		2014
	n	%	n	%	n	%	n	%
Women, 25–64 years
Upper non-manual	149,783	23	163,742	24	165,790	24	170,860	25
Lower non-manual	352,058	53	366,483	53	383,892	56	376,383	56
Manual workers	156,307	24	154,559	23	139,015	20	128,393	19
All	658,148	100	684,784	100	688,697	100	675,636	100
Men, 25–64 years
Upper non-manual	160,443	26	176,312	27	170,807	27	168,209	28
Lower non-manual	157,726	25	159,377	25	167,233	27	160,297	26
Manual workers	300,198	49	311,037	48	288,682	46	276,209	46
All	618,367	100	646,726	100	626,722	100	604,715	100

^a The study population for each year is equal to the population at the end of the preceding year