The table shows the distribution of prize money among the top 20 professional golfers. Calculate the cumulative distribution of income of these golfers and draw the prize money Lorenz curve of these golfers. Which distribution is more unequal: the distribution of income of these golfers or that of the United States as a whole?

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Professional golfers Lowest 20 percent Second 20 percent Third 20 percent Fourth 20 percent Highest 20 percent Income (percentage) 15 16 18 20 31