Where does the us rank for life expectancy at birth?
No context provided
Where does the US rank for life expectancy at birth overall according to the UNDP 2018?
35
No context provided
Where does the US rank for life expectancy at birth overall according to the WHO's 2015 list?
38
No context provided
Where does the US rank for life expectancy at birth overall according to the OECD's 2016 list?
28
List of countries by life expectancy
https://en.wikipedia.org/wiki/List%20of%20countries%20by%20life%20expectancy
Comparing life expectancies across countries can be problematic. For example, due to poor reporting in some countries and various local standards in collecting statistics. 
List of countries by life expectancy
Comparing life expectancies across countries can be problematic due to poor reporting in some countries and various local standards in collecting statistics. In 2015, the WHO listed the United States life expectancy at birth overall at 38. In 2016, the OECD put the US at 28. According to the UNDP, the US is ranked 35 at birth overall.