TABLE 1—

Age Distribution of Reported Pertussis Cases During Outbreaks: Minnesota Department of Health, Dakota County, Minnesota, 2004, 2008, 2012

Age Group	2004, %	2008, %	2012, %
6 mo–6 y	9.1	11.9	14.4
7–10 y	11.2	30.9	29.2
11–18 y	58.1	40.3	33.6
≥ 19 y	21.2	17.0	23.2
Missing	0.4	0.0	0.0
Total	100.0	100.0	100.0

Note. Data are percentages of total cases. Total population was n = 241 for 2004, n = 395 for 2008, and n = 272 for 2012. Total percentages may exceed 100.0 because of rounding.