This graph show no new insight, but still will surprise some people: how big is the correlation between studying and living longer:

More information?  The latest issue of Education Indicators in Focus seeks to answer the question how education can predict social outcomes such as life expectancy, civic engagement and general life satisfaction by comparing the social benefits of education in selected OECD countries.

Data show that life expectancy is strongly associated with education. On average, among 15 OECD countries with available data, a 30-year-old tertiary-educated man can expect to live eight years longer than a 30-year-old man who has not completed upper secondary education.

Data also show that adults who have attained higher levels of education are generally more likely than those with lower levels of educational attainment to report stronger civic engagement, in terms of voting, volunteering, political interest, and interpersonal trust.

Apart from raising  income levels, education has the potential to help individuals develop skills, improve  social status and gain access to networks that could lead to enhanced social outcomes.  By fully recognising the power of education, policy makers could better address diverse societal challenges. (source)