Well-being is a multidimensional concept, for countries as well as for individuals. Thus, in the recent OECD report "How's Life 2015: Measuring Well-Being," the emphasis goes well beyond basic one-dimensional measures of well-being like per capita GDP and offers comparisons across a range of measures of well being for the countries that are members of the OECD.
The OECD membership includes 34 countries. It includes the US and Canada, many countries across western and eastern Europe, Japan and Australia, and a few others additions like Korea, Israel, Mexico, and Chile. Thus, it would be fair to say that it includes mostly the high-income countries of the world. The OECD is a combination think-tank and forum: it collects a wide range of data and publishes reports, but it has no power beyond its own reputation for accuracy and even-handedness.
In the calculations shown here, each measure of well-being is expressed in "standard deviations," which in case your statistics is a little rusty, can be used to look at how far a value is from the average. If you plot each of these statistics for the 34 countries of the OECD, most of the countries will tend to bunch fairly near the average value, while a few countries will be higher or lower. The OECD notes that for these statistics, about two-thirds of 34 countries will be between -1 and +1 standard deviations of the mean value. Thus, about five countries will be above +1 and another five will be below -1.
So when you read these charts for various countries, they are basically telling you if a country is pretty close to the average for the high-income countries of the world, or whether it really stands out from the average.
Here's what the US looks like in this framework.. For household income and financial wealth, the US is an extreme outlier in comparison to the OECD peer group with values above 2. The US also stands out in earnings, rooms per person, housing affordability, educational attainment, and perceived health. However, the US stands out in a negative way in categories like time off, adult skills, and deaths due to assault.
The chart for France made me smile. Overall France is even closer to the OECD average on most of these measures that Germany. France stands out a bit on household income, voter turnout, and life expectancy. But by these measures, the most striking difference for France is the large amount of time off!