Line graph showing notification rates (per 100,000) by quarter for age groups 0-4 years, 5-9 years, 10-14 years, 15-19 years and 20 years and over for the period 2008-2012. The highest notification rate over the course of the outbreak was in the December 2011 quarter, when the notification rate for 5-9 year olds was 341 per 100,000. The notification rate was also high for 10-14 year olds at this time (243 per 100,000). The notification rate for 0-4 year olds peaked in the following quarter, at 207 per 100,000. Notification rates for 15-19 year olds and those 20 years of age and over were comparatively low over the outbreak period.