Good data is hard to come by. You could say the market average, but there's the obvious question of distribution: if hedge funds, "0.1%", or the Queen of Englan

Good data is hard to come by. You could say the market average, but there's the obvious question of distribution: if hedge funds, "0.1%", or the Queen of England are doing far better than average, so that the distribution is skewed, then you the average is a poor statistic for what the common man can expect to get.