World Health and Life Expectancy

I came across this site with a lot of different statistics, among them the historical life expectancy for the different countries of the world:

It is quite interesting to see how things have changed between 1960 and 2016. Most countries have improved their life expectancy, both for male, female and overall, but what is striking is the geographical change that have taken place, with the rich countries of the west being in majority near the top, but changing places, while some of the developing countries of 1960 climbing up the rankings.
Most noticeable to me is Singapore, which goes from somewhere in the 40s to 3rd or 4th place in 2010 and 2016.

At the same time Norway drops from top ranking to 10-12 place in the same time span. The rest of Scandinavia has a similar faith.

US has suffered a similar drop, from around 16 in 1960 to 37 for overall life expectancy in 2016.
This being a US website, there are detailed statistics for individual US states as well.