The line graph shows the top marginal income tax rates in the United States from 1925 thro...

The line graph shows the top marginal income tax rates in the United States from 1925 through 2005. Use the graph to solve.

For the period from 1950 through 2005, during which year did the United States have the lowest marginal tax rate? Estimate, to the nearest percent, the tax rate for that year.