The stacked line chart shows the value of each of Danny's investments. The stacked line chart contains three regions. The uppermost unshaded region represents the value of Danny's investment in individual stocks. The center shaded region represents the value of Danny's investment in mutual funds and the bottom region in black represents the value of Danny's investment in a CD. The thickness of a region at a particular time tells you its value at that time. 
Use the graph to answer the question.
-In the year 1998, approximately what percentage of Danny's total investment was in mutual funds?
Definitions:
Inclined Sloped Surface
A surface that is tilted or angled relative to a reference plane, creating an incline or decline.
Sloped Surface
An area that inclines at an angle relative to a horizontal plane, significant in design for drainage, aesthetics, and functional purposes.
Inclined Surface
A flat area angled relative to a horizontal or vertical plane, commonly considered in design and manufacturing for functionality or aesthetic purposes.
Perpendicular Surface
A surface that forms a right angle (90 degrees) with another surface or the base line of reference.
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