Figure 6: Notification rate of unspecified hepatitis B, Australia, 2012, by age group and sex This figure shows the notification rate of unspecified hepatitis B in Australia in 2012, by age group and sex. The figure shows that for both males and females, the peak of notification rates occurred among those aged 30 to 34 years. The figure also shows that notification rates were higher among males across almost all age groups, reflecting a male to female ratio of 1.3:1.