Age	Frequency of mammograms	Total
Total	Total	9,306.8
Total	At least once a year	2,470.8
Total	Every two years	3,783.3
Total	Every three years or more	801.3
Total	Never	2,005.9
Total	No data recorded	245.5
20 to 24 years of age	Total	.
20 to 24 years of age	At least once a year	.
20 to 24 years of age	Every two years	.
20 to 24 years of age	Every three years or more	.
20 to 24 years of age	Never	.
20 to 24 years of age	No data recorded	.
25 to 34 years of age	Total	548.4
25 to 34 years of age	At least once a year	74.7
25 to 34 years of age	Every two years	54.2
25 to 34 years of age	Every three years or more	35.6
25 to 34 years of age	Never	352.4
25 to 34 years of age	No data recorded	31.5
35 to 44 years of age	Total	1,484.5
35 to 44 years of age	At least once a year	360.1
35 to 44 years of age	Every two years	299.0
35 to 44 years of age	Every three years or more	152.1
35 to 44 years of age	Never	642.3
35 to 44 years of age	No data recorded	30.9
45 to 54 years of age	Total	2,428.2
45 to 54 years of age	At least once a year	781.5
45 to 54 years of age	Every two years	1,026.2
45 to 54 years of age	Every three years or more	202.4
45 to 54 years of age	Never	381.9
45 to 54 years of age	No data recorded	36.3
55 to 64 years of age	Total	2,235.2
55 to 64 years of age	At least once a year	627.9
55 to 64 years of age	Every two years	1,388.4
55 to 64 years of age	Every three years or more	118.8
55 to 64 years of age	Never	71.4
55 to 64 years of age	No data recorded	28.7
65 to 74 years of age	Total	1,774.3
65 to 74 years of age	At least once a year	474.3
65 to 74 years of age	Every two years	848.2
65 to 74 years of age	Every three years or more	169.0
65 to 74 years of age	Never	226.5
65 to 74 years of age	No data recorded	56.3
75 years old and over	Total	746.9
75 years old and over	At least once a year	131.5
75 years old and over	Every two years	165.5
75 years old and over	Every three years or more	119.6
75 years old and over	Never	268.5
75 years old and over	No data recorded	61.8