Every discussion about the 'top 10%' seems to make the underlying assumption that the set of people who fall under that category are consistent. While there are certainly individuals who enter the top 10% (or top 1%) and stay there; there are large numbers of people who move in and out of those categories.
For me personally, I am in the top 10%; but a few decades ago, I was not.
For me personally, I am in the top 10%; but a few decades ago, I was not.