My main worry originally was that 10 year groupings could hide effects on very young children (<1 year). As the parent of a 7 month old this was a concern to me.
However we see 0 deaths in 400+ cases in <10 year olds so this suggests a fairly low upper bound for fatality rates in the very young (compared to the rates in the very old).
Interestingly <20 year olds only accounted for 2% of cases so either there is a reporting issue or so far children are less likely to get the disease (or more likely to be asympomatic).
Flu death rates are low even when grouping 0-4 year olds together (.01%, the same as 5-17 yr olds according to the CDC) so this provides some supporting evidence that the very young are not at heightened risk.