Table 1.

Characterization of the study population for each year between 2010 and 2016

	2010		2011		2012		2013		2014		2015		2016
	N	%	N	%	N	%	N	%	N	%	N	%	N	%
Number of women (N)	212,400		276,135		298,843		303,667		302,568		299,404		299,170
Age (years)
50–54	33,095	15.6	45,316	16.4	45,941	15.4	49,365	16.3	49,558	16.4	49,526	16.5	48,136	16.1
55–59	60,836	28.6	80,141	29.0	90,367	30.2	91,648	30.2	91,593	30.3	90,419	30.2	89,385	29.9
60–64	56,985	26.8	78,394	28.4	87,265	29.2	89,173	29.4	88,297	29.2	84,514	28.2	83,996	28.1
65–69	61,484	28.9	72,284	26.2	75,270	25.2	73,481	24.2	73,120	24.2	74,945	25.0	77,653	26.0
mean (SD)	60.6 (5.2)		60.4 (5.1)		60.3 (5.0)		60.2 (5.0)		60.1 (4.9)		60.1 (5.0)		60.3 (5.0)
Number of non-initial screening examinations (N)	212,408		276,143		298,852		303,685		302,590		299,423		299,186
Mean time of follow-up (SD)	1.97 (0.08)		1.98 (0.08)		1.98 (0.08)		1.98 (0.08)		1.98 (0.08)		1.97 (0.08)		1.97 (0.08)