Need a data pointer in ssrs graph

I have a SSRS Graph where count is displayed for each percentage values..

For ex: No of students who got eighty percent is 4, No of Students who got sixty percent is 10 etc

I want to display the graph for each student and for each student the data label should be displayed with his percentage in the graph.

Graph is same for all students but the data label should display the value corresponding the student..

I tried expression for DataLabel visible property but its based on static value. I need to display the data label dynamically.

Any Help is appreciated.