About half died at 1 year. The other half died at 60 years. A few died in between because of wars or whatever. Average: 30 years. I oversimplified a bit, but

About half died at 1 year. The other half died at 60 years. A few died in between because of wars or whatever. Average: 30 years. I oversimplified a bit, but you can see the overview of the statistics misinterpretation.