You said there was no data available, and I provided a reference.
The data you cite has a large age group as well (0-69), which has the same problem you describe. See the comment by user kmm below for a reference with a better breakdown of estimated IFR by age groups. The reference also shows how the IFR increases exponentially by age.
If you want to see what number applies to you in particular, then you need an specific breakdown. But if you need to see what is the risk for the population in general, then the estimated total IFR, sampled from that same population, is valuable. Think of individual risk vs systemic risk.
The data you cite has a large age group as well (0-69), which has the same problem you describe. See the comment by user kmm below for a reference with a better breakdown of estimated IFR by age groups. The reference also shows how the IFR increases exponentially by age.
If you want to see what number applies to you in particular, then you need an specific breakdown. But if you need to see what is the risk for the population in general, then the estimated total IFR, sampled from that same population, is valuable. Think of individual risk vs systemic risk.