Sanket - Could you clarify your question?
Does you data look something like this?
Ok.. in that case how do you seggreagate the value oer year?
For example: If 2014-2015 - 100 - How will you split this 100 between 2014 and 2015?
If I add Year to the columns field and create graph it works provided you can separate the values for each year.
Not sure if this is the case? If not please can you share the sample format and sample of what you are looking for?