During its history, 27 Blue Angels pilots have been killed in air show or training accidents.[42] Through the 2006 season there have been 262 pilots in the squadron’s history,[43] giving the job a 10% fatality rate.
https://en.wikipedia.org/wiki/Blue_Angels
Pretty costly, in men and materiel.
Next step would be to see if the majority were closer to the beginning, of the BA than today. Flight safety is better today than yesterday in theory, and then one would look at aircraft type to see if there was a particular type with a greater fatality rate than other types. Crewmember age and experience would be another factor as would weather. I would agree with you that in today’s world even based on the flight demonstration team concept, ten percent fatality rate is UNACCEPTABLE which is why I would try to narrow down contributing factors that might show improvement over the years.
Just a quick look 1980 to 2016 36 years five killed and if the numbers are right 1946 to 1980 remainder would be 37 killed over a 34 year period, considerably better stats for the later period without looking at other factors.