The share of total income received by the 5 % highest - income households grew from 16.5 % in 1980 to 18.3 % in 1988 .
The share of the highest fifth of income increased from 44.1 % to 46.3 % in same years .
The share of total income received by the 5 % highest - income households grew from 16.5 % in 1980 to 18.3 % in 1988 and the share of the highest fifth of income increased from 44.1 % to 46.3 % in same years .