You can use a table like this to see that US life expectancy doesn't get much better if you calculate it at age 10 or 20 instead of at birth and US ranking is n

You can use a table like this to see that US life expectancy doesn't get much better if you calculate it at age 10 or 20 instead of at birth and US ranking is not much different (actually the US drops a few places): http://www.worldlifeexpectancy.com/your-life-expectancy-by-age http://www.worldlifeexpectancy.com/your-life-expectancy-by-a... For 'first world' countries with low infant mortality rate life expectancy at birth and at age 10 is nearly the same.