Rob Bray points out to me some interesting data from 1999, in which Peter Saunders (SPRC, UNSW) asked respondents to place themselves in an income decile. Of course, 1/10th of the population falls in each decile, so if people are accurate, then the result should be 10 bars, each containing 1/10th of the population. But here’s what Saunders finds:
And for those who like decimal points with their data, here are the percentages:
In other words, only 1/10th of those in the poorest decile know it, and only 1/100th of the top decile are willing to admit it.
A decade on, it’d be worth seeing whether Australian are any better informed about their true position in the income distribution than we were in 1999.