Gini coefficient diagram

You can think of the horizontal axis as percent of people and the vertical axis as the percent of income those people receive. Therefore the curves always start and end at the same places, where 0% of people make 0% of the country's income and 100% of people making 100% of the total income. The disparity comes in at the left hand side of the curve where the percent of people is higher than the percent of income they receive (i.e. 10% of the people getting 5% of the total income). And at the right hand side when the percent of income received rises more than the percent of people receiving it.