12 There are two aspects of the argument addressed to us in relation to ground 3, which asserts that the sentences individually and in total were manifestly inadequate. The first aspect, which was developed only in oral submissions on behalf of the State, suggested that firmer sentences were required because of increased prevalence of offences of this kind. However, as developed, the submission was clearly a submission, not that offences of this kind were in fact increasing in prevalence, but that there was a community perception of such increase. The difficulty with such an argument is that research demonstrates that the public perceives crime to be constantly increasing, even when it is not, overestimates the proportion of crime that involves violence, and underestimates the severity of sentencing practices (see most recently K Gelb, 'Myths and Misconceptions; Public Opinion v Public Judgment and Sentencing' (Research Paper, Sentencing Advisory Council, Victoria, 2006)). No statistical material was presented to us to indicate whether assaults of any particular type were in fact increasing in frequency, and so this aspect of the submission is unsustainable.