Answer
The year 2006 had the most money ($\$20$ billion) spent on DVDs.
Work Step by Step
The graph shows the amount spent on the y-axis and the year on the x-axis.
Note that the highest point is the fourth from the left; the height of which corresponds to approximately 20 billion dollars. Note further that the point represents the year 2006.
Thus, the year 2006 had the most money spent on DVDs.
